Zipper Sliders

The slider does the work of opening and closing a zipper. There are a wide variety of sliders to choose from, with many designed for specific applications. Our zipper sliders are available in numerous styles including short and long tabs, double tabs, single and dual functioning.

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What Are The Different Types of Top Zippers?

Top stops are components attached to the top end of zippers. They are used to stop the zipper sliders from sliding off the chain.

Bottom stops are components attached to the bottom end of gold zipper. They are used to stop further movement of the zipper halves from separating.

For standard one way open end zippers, the bottom stop consists of an insertion box and pin. While for metal zipper two way, the bottom stop is composed of two pins (mobile pin & fixing pin). For standard two way close end zippers, there can be either double top stops or bottom stops, depending on the direction of the double zipper sliders installed. When the zipper sliders are attached in Head-To-Head relation, there will be 2 bottom stops. However, when the zipper sliders are attached in Bottom-To-Bottom relation, there will be 2 top stops.

At riri teeth zipper, both the top and bottom stops are available in multiple gauges and finishes, dependent upon the types of zippers as well as the intended applications. Although they serve the same basic function, irrespective of their varieties, some may feature special functions while others can only be paired up with certain types of zippers.

Below we will look at the commonly seen top and bottom stops used for UZIP Metal  Zippers.

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Metal Zipper Finishes

UZIP offers a variety of gold zipper finishes in numerous tones and shades from classic brass to antiqued copper, high polished silver to bright nickel. With so many options, you’re bound to find the perfect solution to complement your design.

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Jessica Kung

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Metal Zipper Tooth Finish

Shown below are different metal tooth finishes such as golden brass, antique brass, antique copper, black oxidised, silver, aluminium silver, antique silver and copper.  

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Jessica Kung

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Metal Zippers Finish And Size

Shown below are the #3, #5, #7, #12 and 4 different finishes that UZIP ZIPPER offers for heavy duty zippers such as antique brass, brass, aluminium and nickel silver. 

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Jessica Kung

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Metal Tooth Zippers

Zippers made with metal teeth go back to 1893, when Judson Whitcomb patented the first Slide Fastener.

Great advancements have been made since that first interlocking device was developed. Today, UZIP ZIPPER offers gold zipper in different gauges including #0, #1, #2, #3, #4, #5, #7, #8, #10, #12, #15 and distinct finishes. #5, #8 and #10 are used mostly.

The #5 gauge is a medium weight zipper with standard 9/16" tape width or a wider 3/4" tape width. The #10 gauge is a heavy weight zipper available in 3/4" tape width.

Shown below are the 4 different finishes that UZIP ZIPPER offers for metal tooth zippers.

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Jessica Kung

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Zipper Manufacturing Process

Today's zippers comprise key components of either metal or plastic. Beyond this one very important difference, the steps involved in producing the finished product are essentially the same.

1). Making stringers — metal zippers

A stringer consists of the tape (or cloth) and teeth that make up one side of the zipper. The oldest process for making the stringers for a metal zipper is that process invented by Otto Sundback in 1923. A round wire is sent through a rolling mill, shaping it into a Y-shape. This wire is then sliced to form a tooth whose width is appropriate for the type of zipper desired. The tooth is then put into a slot on a rotating turntable to be punched into the shape of a scoop by a die. The turntable is rotated 90 degrees, and another tooth is fed into the slot. After another 90 degrees turn, the first tooth is to make the stringer for a spiral plastic zipper, a round plastic wire is notched and then fed between two heated screws. These screws, one rotating clockwise, the other counterclockwise, pull the plastic wire out to form loops. A head maker at the front of each loop then forms it into a round knob. This method requires that a left spiral and right spiral be made simultaneously on two separate machines so that the chains will match up on a finished zipper clamped onto the cloth tape. The tape must be raised slightly over twice the thickness of the scoop—the cupped tooth—after clamping to allow room for the opposite tooth on the completed zipper. A slow and tedious process, its popularity has waned.

Another similar method originated in the 1940s. This entails a flattened strip of wire passing between a heading punch and a pocket punch to form scoops. A blanking punch cuts around the scoops to form a Y shape. The legs of the Y are then clamped around the cloth tape. This method proved to be faster and more effective than Sundback' s original.

Yet another method, developed in the 1930s, uses molten metal to form teeth. A mold, shaped like a chain of teeth, is clamped around the cloth tape. Molten zinc under pressure is then injected into the mold. Water cools the mold, which then releases the shaped teeth. Any residue is trimmed.

2). Making stringers — plastic zippers

Plastic zippers can be spiral, toothed, ladder, or woven directly into the fabric. Two methods are used to make the stringers for a spiral plastic zipper. The first involves notching a round plastic wire before feeding it between two heated screws. These screws, one rotating clockwise, the other counter-clockwise, pull the plastic wire out to form loops. A head maker at the front of each loop then forms it into a round knob. Next, the plastic spiral is cooled with air. This method requires that a left spiral and right spiral be made simultaneously on two separate machines so that the chains will match up on a finished zipper.

The second method for spiral plastic zippers makes both the left and right spiral simultaneously on one machine. A piece of wire is looped twice between notches on a rotating forming wheel. A pusher and head maker simultaneously press the plastic wires firmly into the notches and form the heads. This process makes two chains that are already linked together to be sewn onto two cloth tapes.

To make the stringers for a toothed plastic zipper, a molding process is used that is similar to the metal process described in step #2 above. A rotating wheel has on its edge several small molds that are shaped like flattened teeth. Two cords run through the molds to connect the finished teeth together. Semi-molten plastic is fed into the mold, where it is held until it solidifies. A folding machine bends the teeth into a U-shape that can be sewn onto a cloth tape.

The stringers for a ladder plastic zipper are made by winding a plastic wire onto alternating spools that protrude from the edge of a rotating forming wheel. Strippers on each side lift the loops off the spools while a heading and notching wheel simultaneously presses the loops into a U shape and forms heads on the teeth, which are then sewn onto the cloth tape.

Superior garment zippers can be made by weaving the plastic wire directly into the cloth, using the same method as is used in cloth weaving. This method is not common in the United States, but such zippers are frequently imported.

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Zipper Types

Coil zippers now form the bulk of sales of zippers worldwide. The slider runs on two coils on each side; the teeth are formed by the windings of the coils. Two basic types of coils are used: one with coils in spiral form, usually with a cord running inside the coils; the other with coils in ladder form, also called the Ruhrmann type. Coil zippers are made of polyester coil and are thus also termed polyester zippers. Nylon was formerly used and though only polyester is used now, the type is still also termed a nylon zipper.

Invisible zippers have the teeth hidden behind a tape, so that the zipper is invisible. The tape's color matches the garments, as does the slider's. This kind of a zipper is common in skirts and dresses. Invisible zippers are usually coil zippers. They are also seeing increased use by the military and emergency services because the appearance of a button down shirt can be maintained, while providing a quick and easy fastening system.

Reverse coil zippers are a variation of the coil zipper. A reverse coil zipper is exactly that - the coil is on the reverse (back) side of the zipper and the slider is engineered to work on the flat side of the zipper (normally the back, now the front). Unlike an invisible zipper where the coil is also on the back, the reverse coil shows stitching on the front side and the slider will accommodate a variety of pulls (the invisible zipper requires a small, tear-drop pull due to the small slider attachment). Water resistant zippers are generally configured as reverse coil so that the pvc coating can cover the stitching.

Metal zipper is the classic zipper type, found mostly in jeans today. The teeth are not a coil, but are individual pieces of metal molded into shape and set on the zipper tape at regular intervals. Metal zippers are made in brass, aluminum and nickel, according to the metal used for teeth making. All these zippers are basically made from flat wire. A special type of metal zipper two way is made from pre-formed wire, usually brass but sometimes other metals too. Only a few companies in the world have the technology. This type of pre-formed shiny silver zipper is mainly used in high grade jeans-wear, work-wear, etc., where high strength is required and zippers need to withstand tough washing.

Plastic-molded zippers are identical to metallic zippers, except that the teeth are plastic instead of metal. Metal zippers can be painted to match the surrounding fabric; plastic zippers can be made in any color of plastic. Plastic zippers mostly use polyacetal resin, though other thermoplastic polymers are used as well, such as polyethylene.

Open-ended zippers use a box and pin mechanism to lock the two sides of the zipper into place, often in jackets. Open-ended zippers can be of any of the above described types.

Closed-ended zippers are closed at both ends; they are often used in luggage.

Magnetic zippers allow for one-handed closure and are used in sportswear. 

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Jessica Kung

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How to Get a Zipper to Work Smoother

You've just pulled on your favorite jacket and you're running out the door into the cold night air -- when the gold metal zipper gets stuck. Instead of having this or any other zipper professionally repaired, save a bundle of cash and fix the stuck zipper you. Zippers typically get stuck if they're blocked by an obstruction, but they may also stop gliding smoothly as a garment ages. Fix your corn teeth zipper by using one of several common household items to lubricate the zipper teeth.

Step 1

Check your highly polished metal zipper for obstructions as small pieces of lint or a thread can stop the zipper from sliding properly. If the zipper lining is caught in the zipper, pull the fabric back and forth a few times to get it out. If you see an obstruction that you can't pull out with your fingers, try using a small pair of scissors to remove it. Take care not to damage the garment with the scissors.

Step 2

Open the zipper all the way. Rub over the zipper teeth with a bar of unscented soap, a pencil graphite, a crayon or some candle wax.

Step 3

Zip up the zipper and rub the soap, crayon, candle wax or pencil over the teeth again.

Step 4

Pull the zipper up and down a few times until it glides smoothly. If the zipper continues to stick, apply another coat of wax, soap, crayon or graphite.

Step 5

Rub the zipper with a dry cloth to get rid of any excess residue.

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Types of Zippers based on Element Material

There are 3 main categories of zippers which are based on 3 different types of materials as below:

Metallic Zipper

Metal zipper is most basic original zipper first produced. The first zipper was made of metal around 1917 and 1920s. When slider slides up in a zipper the elements get tightly interlocked to keep zipper shut.

Metal zippers are divided into 2 groups, depending on the material used and the process of manufacture:

Teeth formed from a metal wire, either flat or profiled and made from brass, aluminium, nickel or white brass (nickel-free) Teeth die-cast directly onto the tape.

Metal zippers are usually made in a variety of finishes, such as golden brass, antique brass, antique silver, gunmetal, silver etc. These finishes are achieved by chemical treatment of the zipper chain and matching plating of the sliders and end stops.

Generally metal zippers are available in various finishes, but most commonly used zipper finishes are as below:

Aluminum: Elements are constructed using aluminum

Brass: Elements are constructed using brass alloy, typically a combination of copper and zinc

Antique Brass: Elements made from brass that is chemically treated to give worn-out brass appearance

Black Oxidized: Elements are made from brass that is chemically treated to a black matte finish

Moulded Plastic Zipper

These plastic zippers have individually injected molded teeth, fused directly on to the tape of the zipper. The High performance resins used to manufacture molded plastic elements are incredibly strong and make zippers that are durable, strong and flexible. These zippers are ideal for outerwear and heavy weight garments or any outdoor application.

Plastic zippers are divided into 5 groups:

LFC or L-type zippers made with meander/Ruhrmann type coil, stitched around the edge of the carrier tape.

CFC zippers made with spiral coil, stitched on one side of the carrier tape.

Woven-in coil zippers, in which the coil is formed and directly woven into the carrier tape on special looms.

Plastic moulded zippers, in which the teeth/elements made from polyacetal (commonly known as Delrin‚ ) are directly moulded onto the carrier tape.

Plastic extruded zippers, in which a string of teeth/elements is first extruded and then stitched onto the carrier tape.

Two way zippers: These zippers are made usually in #5 or larger sizes in CFC, plastic moulded and metal. The major applications are outerwear and luggage. These are made in X-type or Otype.

Open End zippers: Some zipper applications require a zipper to detached completely e.g. jackets and outerwear. Instead of a fixed bottom stop, box & pin attachment is used.

Invisible Zipper

The main categories of zippers, as described above, also include speciality zippers, which have special types of construction, or parts, or finishes. CFC zippers have a special class known as Invisible zippers due to the special construction and mode of use. These zippers do not require provision of a fly, since they are made and stitched in such a manner that only a hairline seam is visible from outside. These zips are predominantly used in ladies dresses and skirts. These zippers are available in knitted and woven tapes.

Coil zippers

Coil zippers are made from continuous coil of monofilament in place of individual teeth. Coil zippers are often referred to as nylon zippers. The teeth of these zippers are extruded nylon strip sewn onto the zipper tape. These zippers are very flexible and are available in a variety of sizes (gauges). Coil zippers have many applications from fashion-wear to all types of tents and canvas goods and bags.

If you want to know more about metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

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Types of Zippers based on Functionality

Heavy duty zippers are always measured from "component to component" (end stops), regardless of  zipper style.

Close-end zippers are non-separating and are normally opened and closed with a slider.  The bottom stop is made up of a single part and doesn't allow complete separation of the  chain. These zippers are used on trousers, jeans, bags, boots, etc.

Open-end (separating) zippers have separated ends. The ending part is joined by a box  and pin mechanism provided on the lower end of the zipper. The zippers are closed using  sliders, and are normally used on jackets and other outerwear.

Two-way separating zippers have separated ends as well. The bottom slider allows  movement from the bottom of the zipper. These zippers are used in rainwear, sportswear and sleeping bag.

Two-Way head to head zippers have two sliders at the center of the chain when the  zippers are closed. Head to head zippers can be open-end by pulling the sliders towards the  stops, but cannot be separated because the ending parts have two stops that cannot be  divided. These zippers are mainly used for bags, backpacks and luggage.

Two-way tail to tail (back to back) zippers have sliders on opposite ends when the gold zipper  is closed. These zippers can be opened by pulling the sliders towards each other, but cannot  be separated. They are used for overalls and anything else.

Length Tolerance in Zippers : Generally zippers can vary when bulk is received due to various factors. Based on JIS-S3015 following tolerance is acceptable in zipper lengths.

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How to Size Zippers

The riri teeth zipper we use in clothing today was invented by Whitcomb L. Judson in 1890. The zipper size is quite different from the zipper length. The length of the shiny silver zipper is measured in inches and centimeters by measuring the area of zipper teeth between the zipper top and zipper stop. Zippers come from the manufacturer in various sizes such from size 1 to 15 and beyond. But these sizes don't reflect the exact zipper dimensions. These numbers reflect industry standards for zipper strengths; the larger the number the stronger the zipper. The method for measuring zipper size is different, but still easy.

Instructions

1 Lay the zipper flat with teeth facing up.

2 Search on the zipper slider for a number or letter, such as 10, for example. The inscription #10 means the zipper is 10 mm, while #5 means the zipper is 5 mm.

3 Measure the length from the metal at the top of the zipper to the metal at the bottom of the zipper. Use this same method for all types of zippers. Don't include any extra zipper tape in your measurement.

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Jessica Kung

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Zipper Manufacture

Forbes reported in 2003 that although the zipper market in the 1960s was dominated by Talon Zipper (USA) and Option (Germany), Japanese manufacturer YKK Group grew to become the industry giant by the 1980s. YKK held 45% of the world market share, followed by Option (8%) and Talon Zipper (7%).

Indian Tex Corp has also emerged as a significant supplier to the apparel industry.

In Europe, Cremalleras Rubi company established in 1926 (Spain), continues to compete with the big multinationals selling over 30 million zippers in 2012.

In 2005, The Guardian reported that China had 80% of the international market. Most metal zipper is made in Xintang town of Guangzhou City.

If you want to know more about zippers, please contact with UZIP

 

Jessica Kung

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Email: uzipga@hotmail.com

Inventions which may instead of zipper

It seems that there is always a need to open and close things repeatedly and quickly. The heavy duty zippers does a very good job of that, but there are other inventions designed to do the same thing.

Have you ever packed a lunch to take on a trip? You may have used a Ziploc bag to keep your sandwich fresh. Ziploc bags are made of plastic and have male and female sides that lock together. Originally, Ziploc bags had only one seal, but now many have two. The seals are very tight and can be waterproof. Try doing that with buttons!

Another invention you are probably familiar with is Velcro. Velcro is usually made from nylon and has two sides. One side is called the hook side (it looks like a forest made up of tiny mushrooms). The other side is called the loop side (it looks like chain stitching made from nylon threads). When you press the two sides together, the hooks and the loops lock together to fasten the material.

If you want to know more about gold metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

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Zipper Engineering

What makes a good Riri teeth zipper? Mostly, it must be strong! There are actually six engineering measurements that are made to determine just how strong a zipper is. Who would have thought that! The actual test descriptions get a little complicated to explain, but see if you can get an idea from the names of the tests as to what they are trying to measure:

•Crosswise Strength

•Vertical Tensile Strength of the Top Stop

•Bottom Stop Tearing Strength

•Tensile Strength of the Box

•Slide Lock Strength

•Overall Strength of the Slider

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Jessica Kung

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zipper parts

If you have ever looked at a heavy duty zipper, you know that they seem to be pretty simple devices. But there is more to them than first meets the eye! In general, a zipper has 12 parts. They are:

     •Top Tape Extension: fabric that extends beyond the top of the zipper

     •Top Stop, or Bridge Stop: used at the top of the zipper to keep it from separating

     •Slider: the device that moves up and down the actual chain

     •Pull Tab: the part of the slider that moves up and down to open and close

     •Tape: the fabric part of the zipper

     •Chain: the piece (often metal) composed of the individual zipper teeth

     •Bottom Stop: a device at the bottom of the zipper to keep it from separating

     •Bottom Tape Extension: fabric that extends below the bottom of the zipper

     •Single Tape Width: the width of one half of the zipper fabric

     •Insertion Pin: a device used on a separating zipper (like the kind on a jacket) that allows a person to join the two sides of the zipper together.

     •Retainer Box: an end stop at the bottom of some zippers

     •Reinforcement Film: additional fabric to add reinforcement strength at the bottom of the zipper

Try taking a magnifying glass sometime and seeing how many of the zipper parts you can identify!

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The Invention of the Zipper

Although buttons were easy to use, there were times when better ways to fasten clothing together were needed. Depending on how the buttons were arranged on one’s clothes, the simple act of sitting down could be cumbersome and could damage the upholstery on furniture. Also, buttons do not provide a very tight seal, which is important in cold climates.

In 1851, inventor Elias Howe (who also invented the sewing machine), received a patent for a device called an “Automatic Continuous Clothing Closure.” This would be the first version of what we commonly refer to as a zipper today. Although Howe invented this device, the popularity of the sewing machine occupied so much of his time and effort that he never pursued the development of a market for his invention.

Over forty years would go by with no zippers until another inventor, Whitcomb Judson, developed a similar device he called the “Clasp Locker.” Unlike Howe, Whitcomb decided to market his invention. He formed the Universal Fastener Company to manufacture clasp lockers. Unfortunately, in spite of his best efforts, his product did not capture the public’s attention and never really took off.

All was not lost, however. One of Judson’s engineers, a Swedish gentleman named Gideon Sundback, began working on different designs for the clasp locker. It was Sundback who would create what we would consider to be the first modern zipper, which Sundlack named the “Separable Fastener.” In addition to the “Separable Fastener,” he also invented a machine that could manufacture the device, making several hundred per day.

One of the first buyers for Sundback’s invention was the B.F. Goodrich Company. They wanted to use the device to act as a fastener for a new design they had for rubber boots. It was the people at Goodrich that coined the name “zipper.”

Now the heavy duty zippers are mostly use for garment and bags.

If you want to know more about high polished metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

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The World Before the Zipper

Before the zipper was invented, what kinds of fasteners did people use? In biblical times, men and women wore tunics. Tunics were garments made from two pieces of material that were joined together by a seam at waist level. A tunic was held up against the wearer’s waist by a girdle made from leather or other coarse material. The girdle, which was akin to what we would know as abelt, served as a kind of fastener.

If a man had to work or run, he would pull up his tunic and tuck it into the girdle to give him greater freedom of movement for his legs. This was called girding up one’s loins. If you do a word search in the Bible, you will find the word gird appearing numerous times throughout Scripture. It often means “to fasten” something to a person, whether it be clothes or a weapon.

Another piece of clothing that was often worn, especially during cold weather, was a cloak. A cloak was a piece of cloth that had slits in it for arms. It was worn over the top of a tunic. Because of their designs, neither the tunic nor the cloak required any kind of special fastener to hold things together. Wearing them was simply a matter of sliding the garment on and adjusting the girdle.

About 2800 BC, people began to adorn clothes with ornaments and seals made from seashells that were carved into different shapes. These served no real functional purpose that we know of other than fashion. But that started to change in the 13th century.

The textile industry grew and matured in Europe. Clothing fashions began to change, and garments became increasingly snug. Buttons, and their associated buttonholes, were used to fasten clothes together.

Buttons had some great advantages: They were simple to use and easy to fix or replace. The first European buttons became status symbols. The larger and more intricate a man’s buttons were, the more power and prestige he was given. Gold and silver buttons were proudly displayed by nobility. Specialized button craftsmen were hired to manufacture increasingly ornate buttons that included carvings and paintings on them. Things started to get a bit out of hand, with some men having buttons nearly the size of dinner plates on their jackets!

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Zipper in My Life

A typical morning for me goes something like this: I get up, shower, shave, and get dressed for work. I button my shirt, zipper my pants, tighten my belt, and tie my shoelaces. I then go to the kitchen to make my lunch. I put a sandwich and snacks in zipper bags, throw them in my canvas lunch bag, and close the zipper.

Before I head out the door, I put on a light jacket and zip it up. When I get to work, I go through security where I unzip my lunch bag, show the guard the contents, and then zipper it back up.

Some days, I get calls asking me to test a piece of equipment. I throw my tools in a backpack and close the zipper. When I get to the work location, I unzip the backpack to get to my tools.

Do you see a recurring theme? Devices such as buttons, belts, laces, and zippers are actually tools that are known as fasteners. They are very useful, and you probably use them more than you think!

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Jessica Kung

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Determining Your Zipper Size

For UZIP shiny sliver zipper you can determine the zipper size by looking on the "back" of the zipper slider.

Use

#1, #2, #3 and #4 zippers for children’s wear, pockets, light jackets and ultralight backpacking gear

#5 zippers for jackets, coats, lighter tents and standard backpacking gear, and light bags

#8 zippers for heavy jackets and coats, cases and medium bags, and heavier tents

#10 zippers for heavy bags and cases

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How to Use the Zipper

Highly polished metal zipper fit into a class of mechanical devices called fasteners. A fastener is used to connect two or more things together; that is, to fasten them to one another. If you think about using a zipper, you usually think about an article of clothing such as pants or a coat, and rightly so. The heavy duty zippers fastens two pieces of cloth together. It also provides a simple way to unfasten the same two pieces. That is the beauty of the zipper. It is fast, efficient and can be used over and over again to repeatedly open and close things.

If you want to know more about metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

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Zipper Raw Materials

The basic elements of a zipper are: the stringer (the tape and teeth assembly that makes up one side of a zipper); the slider (opens and closes the zipper); a tab (pulled to move the slider); and stops (prevent the slider from leaving the chain). A separating zipper, instead of a bottom stop that connects the stringers, has two devices—a box and a pin—that function as stops when put together.

Metal zipper hardware can be made of stainless steel, aluminum, brass, zinc, or a nickel-silver alloy. Sometimes a steel zipper will be coated with brass or zinc, or it might be painted to match the color of the cloth tape or garment. Zippers with plastic hardware are made from polyester or nylon, while the slider and pull tab are usually made from steel or zinc. The cloth tapes are either made from cotton, polyester, or a blend of both. For zippers that open on both ends, the ends are not usually sewn into a garment, so that they are hidden as they are when a zipper is made to open at only one end. These zippers are strengthened using a strong cotton tape (that has been reinforced with nylon) applied to the ends to prevent fraying.

If you want to know more about metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

Skype: tdysho

Wechat: jessicakung1017

Whats: 8613631458295

Email: uzipga@hotmail.com

Zipper Source

Metal zipper two way have come a long way since the early bone or horn pins and bone splinters. Many devices were designed later that were more efficient; such fasteners included buckles, laces, safety pins, and buttons. Buttons with buttonholes, while still an important practical method of closure even today, had their difficulties. The shiny sliver zipper was first conceived to replace the irritating nineteenth century practice of having to button up to forty tiny buttons on each shoe of the time.

In 1851, Elias Howe, the inventor of the sewing machine, developed what he called an automatic continuous clothing closure. It consisted of a series of clasps united by a connecting cord running or sliding upon ribs. Despite the potential of this ingenious breakthrough, the invention was never marketed.

Another inventor, Whitcomb L. Judson, came up with the idea of a slide fastener, which he patented in 1893. Judson's mechanism was an arrangement of hooks and eyes with a slide clasp that would connect them. After Judson displayed the new clasp lockers at the 1893 World's Columbian Exposition in Chicago, he obtained financial backing from Lewis Walker, and together they founded the Universal Fastener Company in 1894.

The first zippers were not much of an improvement over simpler buttons, and innovations came slowly over the next decade. Judson invented a zipper that would part completely (like the zippers found on today's jackets), and he discovered it was better to clamp the teeth directly onto a cloth tape that could be sewn into a garment, rather than have the teeth themselves sewn into the garment.

Heavy duty zippers were still subject to popping open and sticking as late as 1906, when Otto Frederick Gideon Sundback joined Judson's company, then called the Automatic Hook and Eye Company. His patent for Plako in 1913 is considered to be the beginning of the modern zipper. His "Hookless Number One," a device in which jaws clamped down on beads, was quickly replaced by "Hookless Number Two", which was very similar to modern zippers. Nested, cup-shaped teeth formed the best zipper to date, and a machine that could stamp out the metal in one process made marketing the new fastener feasible.

The first zippers were introduced for use in World War I as fasteners for soldiers' money belts, flying suits, and life-vests. Because of war shortages, Sundback developed a new machine that used only about 40 percent of the metal required by older machines.

Zippers for the general public were not produced until the 1920s, when B. F. Goodrich requested some for use in its company galoshes. It was Goodrich's president, Bertram G. Work, who came up with the word zipper, but he wanted it to refer to the boots themselves, and not the device that fastened them, which he felt was more properly called a slide fastener.

The next change zippers underwent was also precipitated by a war—World War II. Zipper factories in Germany had been destroyed, and metal was scarce. A West German company, Opti-Werk GmbH, began research into new plastics, and this research resulted in numerous patents. J. R. Ruhrman and his associates were granted a German patent for developing a plastic ladder chain. Alden W. Hanson, in 1940, devised a method.

A stringer consists of the tape (or cloth) and teeth that make up one side of the zipper. One method of making the stringer entails passing a flattened strip of wire between a heading punch and a pocket punch to form scoops. A blanking punch cuts around the scoops to form a Y shape. The legs of the Y are then clamped around the cloth tape that allowed a plastic coil to be sewn into the zipper's cloth. This was followed by a notched plastic wire, developed independently by A. Gerbach and the firm William Prym-Wencie, that could actually be woven into the cloth.

After a slow start, it was not long before zipper sales soared. In 1917, 24,000 zippers were sold; in 1934, the number had risen to 60 million. Today zippers are easily produced and sold in the billions, for everything from blue jeans to sleeping bags.

If you want to know more about metal zipper and zipper puller, please contact with UZIP ZIPPER.

Jessica Kung

Skype: tdysho

Wechat: jessicakung1017

Whats: 8613631458295

Email: uzipga@hotmail.com