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HAND OPERATED SCANNER

IP.com Disclosure Number: IPCOM000025271D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 81K

Publishing Venue

Xerox Disclosure Journal

Abstract

Referring to the drawing, a hand operated scanner 1 for reading documents is shown. Scanner 1 combines a movable head 2 and a guide rail 3 into a single assembly. When used, the scanner is placed on the document to be scanned so that the sensor array 5 covers the desired part of the document to be scanned as head 2 is moved along guide rail 3.

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XEROX DISCLOSURE JOURNAL

HAND OPERATED SCANNER 358/293 CI. U.S. Proposed Jagdish C. Tandon Classification

Int. Cl. H04n 1/10

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Volume 9 Number 2 March/April 1984

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HAND OPERATED SCANNER (Cont'd)

Referring to the drawing, a hand operated scanner 1 for reading documents is shown. Scanner 1 combines a movable head 2 and a guide rail 3 into a single assembly. When used, the scanner is placed on the document to be scanned so that the sensor array 5 covers the desired part of the document to be scanned as head 2 is moved along guide rail 3.

The movable head 2 incorporates a linear encoder 4. Guide rail 3 assures linear motion of the head 2 while the encoder 4 cooperates with a scale on the guide rail 3 to generate timing pulses at equal distances. The timing pulses are in turn used to start integration of the signal in the sensor array 5. Guide rail 3 is relatively heavy to assure that rail 3 is stationary during the scanning motion of head 2.

For storing the scanned information, a memory 6 in the form of microcassette or magnetic bubble memory may be used. Scanner 1 will typically cover an area of Lx'q in one pass.. Guide rail 3 is then repositioned on a different part of the document being scanned for the next pass, or where scanning is completed on a new document to be scanned. Encoder 4 can be magnetic or optical. Currently available encoders can easily provide satisfactory resolutions of about 2.5 u...