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:
Sep. 07, 1982
Filed:
Sep. 30, 1980
Arnold Schonfeld, Norristown, PA (US);
Jules A Eibner, Dresher, PA (US);
Franklin E Bastian, North Wales, PA (US);
Sperry Corporation, New York, NY (US);
Abstract
A duplexing apparatus for printing data or information on both sides of a sheet of paper to be used with laser printers or paper copiers is disclosed. Sheets of paper are fed from a paper feeding station for presentation to an image transfer station. The image transfer station transfers toned images, present on a photosensitive member, to the sheet of paper. After the transfer, the paper is moved along a discharge path to a duplex device which is disposed in close proximity to the paper feeding station. The duplex device engages the sheet of paper leaving the transfer station and either discharges the paper if printing is done thereon to a discharge station or returns the sheet of paper to the paper feeding station for a second presentation to the transfer station for duplex printing. Coded pagination information is sensed and sent to a microcontroller which checks the data to confirm that the pages of data on each of the sheets are being printed in the proper order. In one mode of operation, the second side of a sheet of printing is provided during the first presentation of a sheet of paper to the transfer station and then on the subsequent presentation the first side of printing is placed on the sheet of paper. This procedure cooperates with a curved portion of the discharge path occurring between the duplex device and the discharge station to place the first side of printing on the sheets of paper face down and in proper order in the discharge station.