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Web Notching Apparatus

IP.com Disclosure Number: IPCOM000075835D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 3 page(s) / 40K

Publishing Venue

IBM

Related People

Johnson, OD: AUTHOR [+3]

Abstract

A reciprocating punch passes through a web into a die in a rotating driven cylinder to provide notch cuts at predetermined positions alone the web, while web and cylinder move in unison without relative motion.

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Web Notching Apparatus

A reciprocating punch passes through a web into a die in a rotating driven cylinder to provide notch cuts at predetermined positions alone the web, while web and cylinder move in unison without relative motion.

Cylinder 1 has flanges 2 spaced axially a distance substantially equal to the width of the web 3 of card stock, or the like, into the edges of which notches 4 are to be cut at predetermined positions alone the web. Suitable means, not shown, advance web 3 onto the surface of the cylinder. The web then wraps around the surface for approximately 180 degrees as it moves with the cylinder at a speed matched to the surface,s speed, so there will be no relative motion between surface and web. The web then is pulled away from the cylinder by suitable feed rolls, not shown.

As illustrated, a pair of oppositely arranged punches 5 of triangular cross section reciprocate in facing trapezoidal slots 6 in flanges 2. The slots guide the respective punches in a radial path toward the axis of hollow drive shaft 7 for cylinder 1. Stationary cams 8, spaced alone shaft 7, each have an eccentric groove 9 for receiving a roller follower 10 affixed laterally to the outer sides of the respective punches 5. Punches 5 are precisely aligned with die 11 inset into an axially extending peripheral recess 12 in cylinder 1. Each punch has a triangular chamfered cutting edge 5a defined by its radially innermost edge.

As the web moves onto the cylinder surface. edges 5a are at their radially outermost position, spaced slightly above the web. As web and cylinder move in unison, edges 5a reciprocate progressively into shearing contact with the edge of the web and are received in die 11. The triangular chips 13 thus cut to fo...