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Passive Dual Friction Mechanism for Improving a Set Clamp Design

IP.com Disclosure Number: IPCOM000172170D
Publication Date: 2008-Jul-01
Document File: 2 page(s) / 53K

Publishing Venue

The IP.com Prior Art Database

Abstract

Set clamping mechanisms are employed in finishing devices for printing equipment. The set is a stack of sheets of paper or other print media. Sets are clamped and moved during the finishing (e.g. binding) process. This idea proposes a set clamping mechanism that utilizes two different clamping surfaces with different coefficients of friction (COF). Existing method moves sets into a binding position using two moves. In the current system, sets are shingled during these moves due to insufficient friction force between the set and lower clamp surface. A higher friction material can not be used since the clamp has to release the set after the first move and shift to another location on the set. It is proposed that a dual friction lower clamp be used. In the first position, only the lower COF material would touch the set, and in a second position a higher COF material would contact the set. This can be accomplished by spring loading the low COF material so that it allows the high COF material to protrude through during actuation, or by coupling the motion of the high COF lower jaw to the motion of the upper jaw.

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Passive Dual Friction Mechanism for Improving a Set Clamp Design

Set clamping mechanisms are employed in finishing devices for printing equipment.  The set is a stack of sheets of paper or other print media. Sets are clamped and moved during the finishing (e.g. binding) process.  This idea proposes a set clamping mechanism that utilizes two different clamping surfaces with different coefficients of friction (COF).   Existing method moves sets into a binding position using two moves. In the current system, sets are shingled during these moves due to insufficient friction force between the set and lower clamp surface. A higher friction material can not be used since the clamp has to release the set after the first move and shift to another location on the set. It is proposed that a dual friction lower clamp be used. In the first position, only the lower COF material would touch the set, and in a second position a higher COF material would contact the set. This can be accomplished by spring loading the low COF material so that it allows the high COF material to protrude through during actuation, or by coupling the motion of the high COF lower jaw to the motion of the upper jaw.

The current clamp mechanism moves sets of unbound sheets from the compiler to binding unit.  The sets are moved in two steps requiring gripper to release-move-re-gr...