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Fusing Offset Masters

IP.com Disclosure Number: IPCOM000051723D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Brandon, FY: AUTHOR [+5]

Abstract

A higher than normal fusing temperature is used to fuse offset masters. Copy throughput is also reduced in order to give the fuser time to recover from the cooling effect of fusing an offset master.

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Fusing Offset Masters

A higher than normal fusing temperature is used to fuse offset masters. Copy throughput is also reduced in order to give the fuser time to recover from the cooling effect of fusing an offset master.

A xerographic copier is normally used to fuse dry, particulate toner to a sheet of plain white paper, as by the use of a hot roll fuser. In such a fuser, a heated roll directly engages the toner side of the paper. It is also possible to use this type of copier to fuse toner to an offset master sheet in order to prepare a master which is thereafter used in an offset printer to produce a great number of copies therefrom.

The copier includes a control button labeled ""offset master''.

This button is depressed to indicate a desire to prepare one or more offset masters. Actuation of this button causes the copier to immediately become inhibited for use, and a ""not ready'' or ""please wait'' light is illuminated to inform the operator that the offset master cannot immediately be fused.

Actuation of this button also increases the fuser's set point temperature by about 20 degrees F. As soon as the fuser's temperature control network senses that this higher than normal fusing temperature has been achieved, the copier becomes ready and the above-mentioned light is extinguished.

The copier is, however, controlled to make only one copy (offset master), and this copy must be made within a short time period, such as 30 seconds. If a copy is not made during thi...