The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 1996
Filed:
Feb. 26, 1993
Kouichi Kamon, Yokohama, JP;
Hiroyuki Kawamoto, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image reading device has a photoelectric transducer for scanning an image to read it line by line and converting the resulting optical data to an electric signal. A driver drives the photoelectric transducer in response to a synchronizing signal. An internal period signal generating circuit generates an internal period signal having a predetermined period. A period setting circuit sets the predetermined period of the internal period signal. A synchronization switching circuit selects and outputs either of the internal period signal or an external period signal sent from the outside of the image reading device as the synchronizing signal. Even when an external period signal from an image recorder including a polygon motor or similar external apparatus is not available or when the external apparatus is not operated, the device can surely read a document. When the device is used as a terminal unit of an external apparatus, it can flexibly match itself to the external apparatus with respect to the synchronizing signal.