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DOCUMENT LOADING AND REGISTRATION

IP.com Disclosure Number: IPCOM000023918D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 537K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a system for the manual or automatic loading and registration of document sheets onto an apertured vacuum belt system on which the documents may be transported and imaged in a copier. As schematically shown in the figure, for loading a document 1 onto the apertured belt 2 a set of registration fingers 3 is swung down against the belt 2 at a distance from the loading (upstream) edge 2a of the belt 2 corresponding to a major lead area (e.g., 35%) of the document. The perforated belt 2 is supported and supplied with a vacuum through an apertured top plate 4 of an underlying vacuum chamber 5. The vacuum chamber 5 is provided with a vacuum by a vacuum blower 6. Additionally, for registration a load damper/air baffle 7 is rotated to an upright position adjacent to or slightly downstream of the registration line of the registration fingers 3, When this load damper/air baffle 7 is in its upright or document-loading position, it reduces or eliminates the air flow and resulting vacuum in a section or segment 5a of the vacuum chamber 5. This section 5a underlies the document-4oading area of the belt 2, i.e., underlies the belt 2 in the entire area upstream of the registration fingers 3. Thus, when this damper 7 is closed, as illustrated, the vacuum applied to the document being loaded is either significantly decreased or eliminated. This results in a lower normal force between the document 1 being loaded and the belt 2 in the loading area. This allows the document being registered to be moved and positioned or repositioned for registration up against the registration fingers 3 with only slight manual force or with conventional upstream sheet-feeding means. To put it another way, the document being loaded is not frictionally "grabbed" by a strong vacuum through the belt during the registration operation before true registration is achieved, although some slight vacuum holddown can be provided if desired.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

DOCUMENT LOADING AND REGISTRATION Proposed Classification

  ~ U.S. CL 271/246 Terry L. DeWaters mt. CL 665h 9/04 Robert E. Hartman

Disclosed is a system for the manual or automatic loading and registration of document sheets onto an apertured vacuum belt system on which the documents may be transported and imaged in a copier.

As schematically shown in the figure, for loading a document 1 onto the apertured belt 2 a set of registration fingers 3 is swung down against the belt 2 at a distance from the loading (upstream) edge 2a of the belt 2 corresponding to a major lead area (e.g., 35%) of the document. The perforated belt 2 is supported and supplied with a vacuum through an apertured top plate 4 of an underlying vacuum chamber
5. The vacuum chamber 5 is provided with a vacuum by a vacuum blower 6. Additionally, for registration a load damper/air baffle 7 is rotated to an upright position adjacent to or slightly downstream of the registration line of the registration fingers 3, When this load damper/air baffle 7 is in its upright or document~loading position, it reduces or eliminates the air flow and resulting vacuum in a section or segment 5a of the vacuum chamber 5. This section 5a underlies the document-4oading area of the belt 2, i.e., underlies the belt 2 in the entire area upstream of the registration fingers 3. Thus, when this damper 7 is closed, as illustrated, the vacuum applied to the document being loaded is either significantly decreased or eliminated. This results in a lower normal force between the document 1 being loaded and the belt 2 in the loading area. This allows the document being registered to be moved and positioned or repositioned for registration up against the registration fingers 3 with only slight manual force or with conventional upstream sheet-feeding means. To put it another way, the document being loaded is not frictionally "grabbed" by a strong vacuum through the belt during the registration operation before true registration is achieved, although some slight vacuum holddown can be provided if desired. Meanwhile, since the baffle or valve 7 does not affect the rest of the vacuum chamber 5, a full vacuum holddown force can be provided at all times for the other documents on the same belt 2 downstream of the registration fingers 3 without any change in the operation of the vacuum blower 6.

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Volume 4 Number 2 March/April 1979 213

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DOCUMENT LOADING AND REGISTRATION (Cont~d)

Once the document has been prope...