Browse Prior Art Database

Document Sensor

IP.com Disclosure Number: IPCOM000043701D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Hasegawa, M: AUTHOR [+2]

Abstract

This article describes a document sensor in which a CCD (charge-coupled device) sensor array for sensing reflected light from a document is also used to sense the presence of the mechanical sensor element. The mechanical sensor element is moved into sight of the CCD sensor array by the document, and moved out of sight when the document has left the scan station. The CCD array sensor 1, which includes plural CCD elements arranged in a line, senses reflected light from document 2 through lens 3. The document 2 is illuminated by a lamp (not shown). The document 2 is moved in the direction of arrow 4 by feed rolls 5. Mechanical sensor element 6 is pivotally mounted on a machine frame (not shown) at pivot point 7.

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Document Sensor

This article describes a document sensor in which a CCD (charge-coupled device) sensor array for sensing reflected light from a document is also used to sense the presence of the mechanical sensor element. The mechanical sensor element is moved into sight of the CCD sensor array by the document, and moved out of sight when the document has left the scan station. The CCD array sensor 1, which includes plural CCD elements arranged in a line, senses reflected light from document 2 through lens 3. The document 2 is illuminated by a lamp (not shown). The document 2 is moved in the direction of arrow 4 by feed rolls 5. Mechanical sensor element 6 is pivotally mounted on a machine frame (not shown) at pivot point 7. The mechanical sensor element 6 has an extended portion 9, and its lower surface 10 is colored black, as shown in Fig. 2. The mechanical sensor element 6 is spring biased to the dotted position shown in Fig.
3. When the document 2 is fed to the scan station, the leading edge of the document 2 engages with the extended portion 9 and rotates the mechanical sensor element 6 in the counterclockwise direction around the pivot point 7, as shown in the Fig. 3. The sight of the CCD sensor array 1 is divided into two areas A and B. The CCD elements in the region A sense the reflected light from the document, and the CCD elements in the region B sense the reflected light from the black colored lower surface 10 of the mechanical sensor element 6. When t...