Patent ID: 6286446
Filing Date: 2001-09-11
Classification: A44B,D05B

Abstract:
A multi-needle zipper tape stitching mechanism comprising:a bottom needle plate, said bottom needle plate comprising two parallel guide grooves extended lengthwise on the middle, a rectangular opening through a middle part of said parallel guide grooves, and two transverse sliding grooves respectively extended from two opposite sides of said rectangular opening;a guide plate fixedly fastened to said bottom needle plate by screws and suspended in said rectangular opening, said guide plate comprising two parallel guide grooves formed on a top side wall thereof and respectively coincided with the guide grooves on said bottom needle plate, and two needle holes respectively formed in the guide grooves on said guide plate;two presser plates respectively installed in the transverse sliding grooves on said bottom needle plate, said presser plates each comprising a bottom rail respectively coupled to the transverse sliding groove on said bottom needle plate and fixed in place by screws;a cover board covered on said bottom needle plate in front of said guide plate;a transverse guide bar mounted on said bottom needle plate at a front side and suspended above the guide grooves on said bottom needle plate, said transverse guide bar having a partition plate vertically disposed on the middle and spaced between the guide grooves on said bottom needle plate;an upper needle plate covered on a part of said bottom needle plate, said upper needle plate comprised of two symmetrical pressure plates, and a fixing plate fastened to said pressure plates at a top side by screws to fix said pressure plates together, said pressure plates each comprising a side opening, which receives one of said presser plates, a needle hole corresponding to one needle hole on said guide plate, and two bottom flanges bilaterally disposed at the front side and defining with said guide plate and said bottom needle plate a zipper tape passage; andtwo stitching needles reciprocated through the needle holes on said upper needle plate and the needle holes on said guide plate to fasten two chains to two zipper tapes with three threads respectively, said stitching needles each comprising three needle rods arranged in parallel and spaced from one another at a different pitch, said needle rods each having a point and an eye on the point for the insertion of a respective thread.