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Browse Prior Art Database

Uniform Pinch Pressure at Paper Path Reference Edge

IP.com Disclosure Number: IPCOM000046166D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Hlavacek, RP: AUTHOR [+2]

Abstract

In a document copier machine where original documents are required to slide along a glass surface for positioning against both a front and a side reference edge, the document can hang up along the side reference edge unless that edge is tight against the glass. This article describes a clamping mechanism for insuring uniform distribution of clamping pressure along the length of the reference edge.

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Uniform Pinch Pressure at Paper Path Reference Edge

In a document copier machine where original documents are required to slide along a glass surface for positioning against both a front and a side reference edge, the document can hang up along the side reference edge unless that edge is tight against the glass. This article describes a clamping mechanism for insuring uniform distribution of clamping pressure along the length of the reference edge.

Fig. 1 shows a top view of a document glass 10 with a front reference edge 11 and side reference edges 12 and 13. A first document is moved across glass l0 in the direction A for referencing at the corner 14. A second document is moved in direction B across glass 10 for referencing at corner 15. During the movement of the documents from edge 16 towards edge 11, the side edges of the documents can slide against reference edges 12 and 13 and, unless these reference edges are tight against glass 10, can cause the document to squeeze under the reference edge, resulting in a jam.

Fig. 2, a top view, and Fig. 3, a cross-sectional side view, illustrate a clamping mechanism for the reference edge which alleviates this problem. A clamping screw l7 holds the reference edge l3 tight against the glass l0. In order to more uniformly distribute the clamping forces along the length of the reference edge, a slot 18 is provided, as shown in Figs. 2 and 3.

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