Depth of field control device

Details Depth of field control device Depth of field control device

2006-12-12

2006-12-12

Tran, Douglas Q. (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S498000, C358S496000, C399S177000, C399S367000, C271S186000

Reexamination Certificate

active

07149005

ABSTRACT:
A depth of field control device is provided. The depth of field control device is installed on an automatic document feeder having a scan glass surface. The depth of field control device comprises a plate member having at least one protrusion on its front side and a hook structure at its backside, wherein the hook structure at the backside of the plate member hooks the automatic document feeder and the protrusion is in contact with the scan glass surface; a reflection sheet attached to the plate member and fixed on the automatic document feeder; and a flexible device biasing the plate member at the backside of the plate member.

REFERENCES:
patent: 5430536 (1995-07-01), Fullerton et al.
patent: 5513017 (1996-04-01), Knodt et al.
patent: 5734483 (1998-03-01), Itoh
patent: 6392763 (2002-05-01), Nishinohara et al.
patent: 6819456 (2004-11-01), Chen
patent: 6859636 (2005-02-01), Mitomi

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