Zipper with stamped metal zipper teeth

Abstract

A zipper with stamped metal zipper teeth includes two zipper tapes each having a rib at one lateral side thereof, and metal zipper teeth mounted at the rib of each zipper tape. Each zipper tooth has two mounting legs located at the rear end thereof and clamped on the rib. The ratio between the width of each zipper tooth and the gap between the mounting legs of each zipper tooth and the ratio between the combined height of each zipper tooth and the associated engagement protrusion and the gap between the mounting legs of each zipper tooth are in respective predetermined ranges so that the zipper teeth are stronger or even smaller than conventional #2 zipper teeth and have a tight connection between the zipper teeth and the zipper tape.

What is claimed is: 
     
         1 . A zipper, comprising: two zipper tapes, each said zipper tape comprising a rib longitudinally extending along one lateral side thereof, and a plurality of zipper teeth fastened to said rib of each said zipper tape, each said zipper tooth comprising an engagement protrusion located on one side of a front end thereof, a recess located on an opposite side of the front end for engaging into the recess of one respective zipper tooth at the other said zipper tape, two mounting legs located at an opposing rear end thereof for clamping on two opposite lateral sides of said rib of one said zipper tape and a retaining hole defined between said two mounting legs for accommodating said rib of one said zipper tape, wherein, if the gap between respective inner walls of respective rear ends of said two mounting legs of each said zipper tooth is referenced by A; the combined height of each said zipper tooth and the associated said engagement protrusion is referenced by B; and the overall width of each said zipper tooth is referenced by C, then the ratio between C and A is in the range of 2.5˜3; and the ratio between B and A is in the range of 1.3˜1.8. 
     
     
         2 . The zipper as claimed in  claim 1 , wherein the size of A is within 0.4 mm˜0.5 mm, the size of B is within 0.6 mm˜0.8 mm, and the size of C is within 1.1 mm˜1.4 mm. 
     
     
         3 . The zipper as claimed in  claim 2 , wherein each said mounting leg comprises a root and an engaging portion extending from said root for engaging said rib; said retaining hole defines a bottom wall, referenced by Z, and two first inner lateral wall respectively located on respective inner sides of said roots of said two mounting legs, said two first inner lateral walls each having a rear end thereof respectively connected to two opposite lateral sides of said bottom wall Z of said retaining hole, said two first inner lateral walls defining a plane X between respective front ends thereof; the midpoint of said bottom wall Z of said retaining hole and two opposite ends of said plane X constitute three points that define an arc line Y; if the projected profile area of said bottom wall Z of said retaining hole, said two first inner lateral walls and said plane X is referenced by S 1  and the projected profile area of said plane X and said arc line Y is referenced by S 2 , then the area S 1  is larger than the area S 2 . 
     
     
         4 . The zipper as claimed in  claim 3 , wherein said first inner lateral walls are planar walls. 
     
     
         5 . The zipper as claimed in  claim 3 , wherein said first inner lateral walls are smoothly arched walls. 
     
     
         6 . The zipper as claimed in  claim 3 , wherein each said first inner lateral wall has a rear end thereof connected to said bottom wall Z of said retaining hole through one of arched surface and sloping wall. 
     
     
         7 . The zipper as claimed in  claim 3 , wherein said engagement portion of each said mounting leg defines a second inner lateral wall and a third inner lateral wall at an inner side thereof; said second inner lateral wall has a front end thereof connected to a rear end wall of the associated said mounting leg, and an opposing rear end thereof connected to sad third inner lateral wall; said third inner lateral wall has a front end thereof connected to said second inner lateral wall, and an opposing rear end thereof connected to the front end of said first inner lateral wall by an arched surface. 
     
     
         8 . The zipper as claimed in  claim 7 , wherein the distance between said two second inner lateral walls is said gap A between the respective inner walls of the respective rear ends of said two mounting legs of each said zipper tooth; said second inner lateral walls of said engagement portions of said mounting legs are planar walls. 
     
     
         9 . The zipper as claimed in  claim 7 , wherein said third inner lateral walls of said engagement portions of said mounting legs are sloping walls. 
     
     
         10 . The zipper as claimed in  claim 7 , wherein said rear end walls of said mounting legs are respectively connected to two opposite outer lateral walls of the respective said zipper tooth by a respective sloping wall.