APPARATUS FOR PERFORATING SHOE TOP PARTS Russian patent published in 2003 - IPC

FIELD: shoe industry. SUBSTANCE: apparatus has spring-loaded plate, to which at least one breaking-through member is rigidly attached, and perforating plate arranged above spring-loaded plate. Number of perforations in perforating plate corresponds to number of breaking-through members. Each of breaking-through members is arranged above respective perforation in perforating plate. Cutting of perforation is effectuated on the basis of inclined scissors defined by cutting edges of at least one breaking-through member and face of at least one respective opening in perforating plate. Breaking-through members have at their lower part bore cut by means of two spherical segments arranged tangentially to one another and having equal radii. Each perforation in perforating plate is made conical, with diameter of opening end facing to bore corresponding to diameter of bore. Inclination angle of conical opening generatrix in perforating plate is within the range of 30-32 deg. Spring-loaded plate with rigidly fixed breaking-through members reciprocates in vertical plane to provide for breaking thorough of openings during movement from the top to the bottom. Apparatus may be used in any branch of industry, where breaking through of perforations in articles from natural, synthetic or artificial leather is needed. EFFECT: improved quality of perforation and reduced deformation of perforation perimeter. 4 cl, 2 dwg