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Browse Prior Art Database

VACUUM STRIPPER VENTING DOOR

IP.com Disclosure Number: IPCOM000023916D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 283K

Publishing Venue

Xerox Disclosure Journal

Abstract

A vacuum copy sheet stripping system with a flapper valve 1 in the stripper vacuum manifold 2 which automatically opens in response to the air flow change due to capture of the lead edge of the copy sheet 3 by the vacuum stripping ports 4. The valve 1 automatically reduces the manifold vacuum pressure as soon as sheet stripping has been accomplished, and thereby reduces the tendency for frictional ustallingu of the stripped copy sheet's subsequent movement over the stripping ports 4. This automatic valving provides an air inflow into the manifold 2 from another opening 5, so that the vacuum will not rise and that the air flow rate to the vacuum source 6 will not decrease due to the captured copy sheet 3 covering the stripping ports.

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XEROX DISCLOSURE JOURNAL

VACUUM STRIPPER VENTING DOOR ~tcer
C. Landrum
D. Velasco

Proposed Classification
U.S. CL 271/96

mt. CL B65h 3/12

A vacuum copy sheet stripping system with a flapper valve 1 in the stripper vacuum manifold 2 which automatically opens in response to the air flow change due to capture of the lead edge of the copy sheet 3 by the vacuum stripping ports 4. The valve 1 automatically reduces the manifold vacuum pressure as soon as sheet stripping has been accomplished, and thereby reduces the tendency for frictional ustallingu of the stripped copy sheet's subsequent movement over the stripping ports
4. This automatic valving provides an air inflow into the manifold 2 from another opening 5, so that the vacuum will not rise and that the air flow rate to the vacuum source 6 will not decrease due to the captured copy sheet 3 covering the stripping ports.

Where the same vacuum system 6 is also being used for the toner cleaning system it is particularly undesirable to have air flow fluctuations thereto, and this system reduces such fluctuations.

A tensioning spring, over~center spring, or magnet loading (not shown) may be applied to the flapper valve 1 to provide a selected opening force threshold level and/or to prevent fluttering or flapping, i.e., to insure two separate and distinct vacuum levels: high for stripping and lower after stripping. Alternatively, the valve 1 could be solenoid actuated in response to electrically sensing of the sheet having b...