Stacked Zipper with Teeth That Mesh Top-to-Bottom

The problem

Almost every zipper in the world interlocks its teeth side by side. The patent argues that this sameness leaves designers and consumers with little variety, and that complicated sliders limit how strongly the teeth hold together. For apparel and bag brands, the zipper is one of the few trims that is visible on almost every product - a different closing style is a design detail customers notice.

The solution

The patent stacks the tooth rows instead of placing them side by side:

1. Teeth (10) are fixed on tapes (20) to form rows (30) - an upper row (31) and a lower row (32).
2. The lower row is the upper row turned over 180 degrees, so both rows use the same tooth.
3. Each tooth has a raised cusp (11A, 12A) and a hollow socket (11B, 12B). When closed, the cusps of each row sit in the sockets of the other, one row on top of the other.
4. The slider (40) has an upper plate and a lower plate joined by a diagonal divider that separates the rows, with an entry for each row above and below it.
5. The inner faces of the plates slope, narrowing from the entries to the closing end, so the slider presses the rows into full engagement; the cavity width matches the tooth width for precise meshing.

Who it is for

• Zipper and trims manufacturers looking for a distinctive product line.
• Apparel, outerwear and bag brands that want a signature closure detail.
• Footwear and accessory designers - boots, pouches and cases with a new zipper look.

How it works

The main parts

Closing

1. Insert the pin and start the slider as usual.
2. The upper row enters above the divider, the lower row below it.
3. The sloped plates squeeze the rows together as the slider moves.
4. The cusps drop into the sockets - the zipper is closed with one row stacked on the other.

Opening

Pulling the slider back separates the rows at the divider: one row leaves above it, the other below.

Applications

Outerwear and sportswear

A visible signature zipper on jackets, fleeces and pockets.

Bags and luggage

A distinctive closure on totes, backpacks and pouches.

Footwear

Boot and sneaker zippers with a different look.

Home textiles and cases

Cushion covers, pencil cases and cosmetic bags.

Where it is less suitable

• Very high-load closures - tents, heavy luggage and protective gear need proven strength data; tests would be required first.
• Price-driven basic garments - a standard coil zipper will usually be cheaper.