Browse Prior Art Database

IMPROVED BOTTOM FEEDING VACUUM CORRUGATION FEEDER

IP.com Disclosure Number: IPCOM000025246D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 61K

Publishing Venue

Xerox Disclosure Journal

Abstract

Use of vacuum corrugation feeders of the type disclosed in U.S. Patent No. 4,324,395 indicates a need to increase stack size capability and improve per-formance. A solution to this need is the combining of air flotation of a sheet stack as shown in U.S. Patent 4,014,537 with vacuum corrugation feeding. As shown in the figure, holes 20 have been added to a sheet stack tray support surface 10 in a preferable number for 8 K" x 11" sheet stacks. However, optimum location of flotation holes will depend on sheet-to-tray pressure profiles with maximum hole density in high pressure areas. Air pressure is supplied to the holes by conventional

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XEROX DISCLOSURE JOURNAL

IMPROVED BOTTOM FEEDING VACUUM CORRUGATION FEEDER U.S. CI. 271/106 John Maksymiak
Richard Edward Smith

Proposed Classification

Int. C1. B65h 3/46

f 'O

Use of vacuum corrugation feeders of the type disclosed in U.S. Patent No. 4,324,395 indicates a need to increase stack size capability and improve per- formance. A solution to this need is the combining of air flotation of a sheet stack as shown in U.S. Patent 4,014,537 with vacuum corrugation feeding. As shown in the figure, holes 20 have been added to a sheet stack tray support surface 10 in a preferable number for 8 K" x 11" sheet stacks. However, optimum location of flotation holes will depend on sheet-to-tray pressure profiles with maximum hole density in high pressure areas. Air pressure is supplied to the holes by conventional

Volume 9 Number 2 March/April 1984 109

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IMPROVED BOTTOM FEEDING VACUUM CORRUGATION FEEDER (Cont'd)

means to levitate the sheet stack and pneumatically lubricate the tray/sheet 1 interface and the sheet l/sheet 2 interface in order to feed a single sheet from the bottom of the sheet stack.

Combining air flotation with a bottom feed, vacuum corrugation feeder provides the advantages over conventional feeders of 1) increased tray capacity, 2) reduced air knife operating pressure, and 3) increased sheet skew control for off-center feeding.

XEROX 110 DISCLOSURE JOURNAL

Volume 9 Number 2 March/April...