Dome head punch

Abstract

A novel punch for employment in a machine utilizing a punch ring containing a number of spaced, radially-arrayed holes in which the punches are secured, with the punch ring being used in cooperative relation with a die ring employing a number of dies corresponding to the number of punches used. During synchronous rotation of the punch ring and the die ring, each punch interacts each time with a corresponding die, with this arrangement making it possible for the edges of a continuous roll of paper or the like destined to be used in a computer or other type of business machine to be rapidly and effectively punched. Although interacting punch and die arrangements are well known, in accordance with this invention I utilize punches that have novel domed heads, with this doming advantageously making it possible for the increment of paper about to be punched to be stretched such that at the time the punch actually enters the die, the stretched piece of paper tends to pop away from the rest of the paper the instant it is punched, thus greatly diminishing the chance of 'hangers' being created, which would later tend to impair the action of the computer or business machine in which the paper is employed. The doming of the punches also serves the additional advantages of diminishing the chance that a new punch will be broken during its first encounter with its respective die, and minimizing the friction present between each die and punch combination during normal operation of the machine.