Ykk Corporation

Ykk Europe Limited

Thomas Pferdehirt

Volker Scheffels

Harald Luer

This male member of a snap fastener is provided with a first portion and a second portion, wherein the first portion is composed of a plastic material, and the second portion is composed of a metal portion. In addition, the male member of the snap fastener has an engaging protrusion part working together with an eyelet of a female member, and a cover which at least partially covers the engaging protrusion part is provided to a side of the male member, the side facing the female member.

Male member of snap fastener and snap fastener

Press stud

Snap fastener part comprising an axis (), a coupling means () for coupling with a complementary coupling means of the other snap fastener part, a fixing means () for fixing the coupling means () to a carrier material (), a cap () for covering the coupling means () on a side facing away from the carrier material () and a protrusion () on the side of the coupling means () facing away from the carrier material (), said protrusion () encircling the axis (), the fixing means () comprising at least one leg () which engages behind the coupling means () on the side facing away from the carrier material () when assembled and which is placed between the surface of the coupling means () facing away from the carver material () and the cap (). According to the invention the protrusion () is broken by the leg () and the surface of the protection facing away from the carrier material () is flush with the surface of the leg () facing away from the carrier material or surmounts it.

Snap fastener part

A capped rivet has a cap,with an exposed topside,and an inside,and further has a rivet part,with a rivet shank,and a rivet flange,. The rivet shank,extends away from the inside,of the cap,and the rivet flange,extends transverse to the axis,of the rivet shank,. The rivet flange,is firmly attached to the cap,, and a reinforcing element,is arranged at the underside,of the rivet flange

Capped rivet

The press fastener comprises, in addition to a press fastener ball fixed to a first carrier web, a press fastener eyelet firmly connectable to a second carrier web by a rived shaft emanating from a rivet cap and passing through a central perforation. A simple construction involving low manufacturing cost, with high durability, i.e. a high number of closing and opening cycles, can be achieved if the press fastener eyelet is formed by a substantially annular, plastic moulding having the central perforation and comprising a round ball reception area and a temporarily widenable locking area which tapers towards the insertion end for the press fastener ball and extends roughly coaxially to the ball reception area. the said plastic body comprises a ring flange-like outer edge, to which is connected in axially displaced manner the central area having the central perforation. Moreover, an all-round groove increasing the resilient action of the locking area is provided in the ring flange-like outer edge of the plastic body radially outside the locking area, with the locking area being constructed polygonally. The plastic moulding may advantageously be moulded from POM (polyoxymethylene).

Press fastener

A watertight press fastener part formed of an eyelet part (,or,) including an eyelet body (,or,) or of a ball part (,) including a ball body (,) and a cap rivet (,) which is fixable to a flat material (,), preferably in the form of a climate membrane, in a watertight manner by riveting. An elastically deformable sealing element (,or,) which is constructed as a molded part contacts the flat material (,). This sealing element is penetrated by the rivet shank (,) of the cap rivet (,) and has, in the assembled state, due to the deformation of the rivet shank, a press face which is formed in an analogous manner by deformation and which surrounds the axial opening (,) of the press fastener part. Together with a counter-face at the eyelet part or at the ball part, the press face defines the clamping area for the flat material (,).

Watertight press fastener part

A push-button closure part including a contoured button, a metallic rivet part having a rivet shank projecting from the underside of the button and an approximately radially extending, round rivet flange. The closure part includes a push button eyelet for slipping onto the rivet shank through a central opening. The rivet shank is deformed in a shallow S-shape which causes flexible material clasped between the rivet flange and the eyelet to be pressed between the edge of the central opening of the eyelet and rivet flange and also between the surrounding outer edge of the eyelet and the rivet flange.

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Wuppertal, Germany

Thomas Pferdehirt