Browse Prior Art Database

Method for Establishing Magnification Ratio

IP.com Disclosure Number: IPCOM000051045D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Smith, GL: AUTHOR

Abstract

This article discloses a method for setting the proper magnification/ reduction reduction ratio in a copier machine. The method calls for placing the original document on the document glass and observing a scale alongside the document glass in order to key the size of the original into the machine. A microprocessor then establishes a ratio consonant with copy paper size, and commands adjusting mechanisms to provide the ratio.

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Method for Establishing Magnification Ratio

This article discloses a method for setting the proper magnification/ reduction reduction ratio in a copier machine. The method calls for placing the original document on the document glass and observing a scale alongside the document glass in order to key the size of the original into the machine. A microprocessor then establishes a ratio consonant with copy paper size, and commands adjusting mechanisms to provide the ratio.

The figure shows an original document 10 corner referenced upon a document glass 11. Scales along the two reference edges establish that a setting of "52 is required in order to completely encompass the original 10 onto copy paper. The operator arrives at this judgment since the vertical edge of original 10 extends to the numeral "5" on the scale 12 alongside the glass. Note that the horizontal edge of original 10 extends only to the numeral "3" on scale
13. Had the reading on scale 13 been larger than the reading on scale 12, the operator would have chosen the larger scale 13 reading. In all cases, the operator chooses the larger reading in order to encompass all of the original on the copy sheet.

The information on the size of the original, e.g., "5" is keyed into the machine by the operator and fed to a microprocessor. Information on the size of the copy paper may also be fed to the processor. From this data, the processor establishes the proper reduction ratio by calculation, or preferably, by...