Sheet feeding or delivering – Feeding – With means to align sheet
Patent
1991-09-20
1992-12-22
Skaggs, H. Grant
Sheet feeding or delivering
Feeding
With means to align sheet
271184, 271261, B65H 714
Patent
active
051729075
ABSTRACT:
The skew angle of a sheet (e.g., business form or other document) is detected by providing two sensors spaced from each other a known distance along a straight line perpendicular to the direction of conveyance of the sheet. If there is a skew, the distance travelled by the sheet leading edge between sensings by the sensors is determined, and the skew angle calculated from its tangent. First and second independent drive rollers under the sheet are driven in opposite directions of rotation to compensate for the skew angle. The rollers preferably act in conjunction with a controller (computer) to not only reorient the sheet to compensate for the skew, but also to rotate the document through a significant angle (e.g., 90.degree.) to give the sheet a second orientation different from its initial orientation (e.g., from portrait to landscape).
REFERENCES:
patent: 3603446 (1971-09-01), Maxey
patent: 4445679 (1984-05-01), Bay
patent: 4500086 (1985-02-01), Garavuso
patent: 4511242 (1985-04-01), Ashbee et al.
patent: 4724945 (1988-02-01), Martin
patent: 4855607 (1989-08-01), Eckl
patent: 4877234 (1989-10-01), Mandel
patent: 4955965 (1990-09-01), Mandel
patent: 4971304 (1990-11-01), Lofthus
Moore Business Forms Inc.
Skaggs H. Grant
LandOfFree
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