Vacuum transport device with non-uniform belt hole pattern

Details Vacuum transport device with non-uniform belt hole pattern Vacuum transport device with non-uniform belt hole pattern

2011-04-12

2011-04-12

Joerger, Kaitlin S (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S275000, C198S471100, C198S689100

Reexamination Certificate

active

07922174

ABSTRACT:
An apparatus comprises a vacuum belt having belt edges and a contact surface between the belt edges. The contact surface is adapted to contact sheets of print media and the sheets of print media have sheet edges and a central sheet region. The contact surface has a central belt region located where the central sheet region of the sheets of print media contacts the contact surface of the vacuum belt. The contact surface has border regions located where the sheet edges of the sheets of print media contact the contact surface of the vacuum belt. The central belt region is located between the border regions. The contact surface has vacuum holes, and the vacuum holes comprise an irregular pattern, such that a different density of holes is located within the border regions relative to the central belt region.

REFERENCES:
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patent: 5564693 (1996-10-01), Elkis et al.
patent: 6406017 (2002-06-01), Yaneda
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patent: 7182334 (2007-02-01), Spence et al.
patent: 7207558 (2007-04-01), Edinger
patent: 7293770 (2007-11-01), Edinger

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