Browse Prior Art Database

Copy Production Machines Having Image Reduction Facilities

IP.com Disclosure Number: IPCOM000088190D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Hubbard, JH: AUTHOR

Abstract

A copy production machine, such as a convenience copier, includes a semiautomatic document feed (SADF) for receiving documents to be copied on a document glass (not shown). A scanner scans the document for projecting an image via a lens system to create a latent image on a photoconductor. A copy production unit cooperates with the photoconductor (belt or drum) to transfer the projected images on copy sheets supplied from a suitable supply. The produced copies are then supplied to an output portion such as a collator or exit tray. A control, preferably of the programmable computer type, adjusts the lens system position between the scanner and the photoconductor for effecting various reduction ratios.

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Copy Production Machines Having Image Reduction Facilities

A copy production machine, such as a convenience copier, includes a semiautomatic document feed (SADF) for receiving documents to be copied on a document glass (not shown). A scanner scans the document for projecting an image via a lens system to create a latent image on a photoconductor. A copy production unit cooperates with the photoconductor (belt or drum) to transfer the projected images on copy sheets supplied from a suitable supply. The produced copies are then supplied to an output portion such as a collator or exit tray. A control, preferably of the programmable computer type, adjusts the lens system position between the scanner and the photoconductor for effecting various reduction ratios. Such reduction ratios can be selected by an operator (not shown) or via a second controlling computer (not shown), communication line, magnetic card input, or the like.

The lens system is adjusted under such programmable control when the copy production machine is not producing copies. As the lens system is being adjusted, a timer is started. If the new reduction ratio is not achieved prior to a timeout of the timer, the programmable control initiates a mode change back to the previously selected reduction ratio. In this way, if a reduction ratio is not achievable by adjusting the lens system because of some malfunction within the lens system transport mechanism, the copy production machine can still be used f...