Photocopying – Including fiber optics
Patent
1981-06-02
1982-12-07
Rubinson, G. Z.
Photocopying
Including fiber optics
355 76, 355 14SH, 271108, 271276, G03G 1500, B65H 312, B65H 502
Patent
active
043623808
ABSTRACT:
A document feeder defines a sheet path along which a document sheet is fed across a platen of a copier/duplicator, for example, in order to copy the sheet. An oscillating vacuum tube feeds sheets from a supply into the sheet path. The feeder includes a platen vacuum transport having vacuum belts that move the sheet across the platen. The vacuum transport has a first vacuum plenum and a second vacuum plenum located along the sheet path. The first vacuum plenum has a relatively high level of vacuum to insure lifting of the sheet onto the vacuum belts. The sheet is then transported into the area where it comes under the influence of the second vacuum plenum. The second vacuum plenum has a somewhat lower level of vacuum, but it is sufficient to retain the sheet on the belts as the belts drive the sheet into engagement with a registration member. One vacuum blower is used to establish a vacuum in the vacuum tube and in the two plenums. Two control valves regulate the flow of air to the blower from the vacuum tube and one of the plenums. One valve controls air flow to the blower from the vacuum tube and the second control valve. The second control valve controls air flow from the first plenum to the first control valve.
REFERENCES:
patent: 2970834 (1961-02-01), Martin et al.
patent: 3625508 (1971-12-01), Shiragai et al.
patent: 3792924 (1974-02-01), Matsuda et al.
patent: 4052128 (1977-10-01), Burton et al.
patent: 4169674 (1979-10-01), Russel
patent: 4176945 (1979-12-01), Holzhauser
patent: 4179215 (1979-12-01), Hage
patent: 4243316 (1981-01-01), Gustafson
Research Disclosure Bulletin, Item No. 21212, Dec. 1981, pp. 440-442, "Document Feeder with Improved Vacuum System."
Research Disclosure Bulletin, Item No. 21140, Nov. 1981, pp. 415-418, "Document Feeder with Vacuum System Having Two Control Valves in Series" by R. T. Dragstedt.
Research Disclosure Bulletin, Item No. 21139, Nov. 1981, pp. 413-415, "Document Feeder with Improved Vacuum System," by Richard S. Muka.
Research Disclosure Bulletin, Item 18540, Sep. 1979, pp. 526-527, "Simplex Document Feeder and Positioner" by Gustafson et al.
Xerox Disclosure Journal, Mar./Apr. 1979, pp. 213-214, "Document Loading and Registration" by Adamek et al.
Childress G. Herman
Eastman Kodak Company
George Keith E.
Rubinson G. Z.
LandOfFree
Document feeder with vacuum system having two control valves in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Document feeder with vacuum system having two control valves in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Document feeder with vacuum system having two control valves in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1900115