Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reissue Patent
1994-08-18
2001-01-02
Lee, John R. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C271S227000
Reissue Patent
active
RE037007
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a device for aligning sheets, such as bank notes in automatic service machines.
If rectangular sheets are guided between conveyor belts or between rollers on long, winding transportation paths where there are a number of points of transfer from the transportation means to a stacking device or checking device, twisting of the individual sheets in their plane from the ideal position can arise. Particularly often, twisting arises to a great extent when the sheet is put in by hand, e.g. when a bank note is put into the automatic service machine. These automatic machines and devices therefore need to have an aligning device.
DESCRIPTION OF THE PRIOR ART
With a known mechanical aligning device (DE-OS 34 41 977), a longitudinal edge of a bank note is pushed against a displaceable locking plate arranged perpendicularly to the transportation path and perpendicularly to the plane of alignment, and the bank note is aligned in this way on the locking plate. The locking plate is then removed from the transportation path and the bank note which has been retained for a short time is transported further.
SUMMARY OF THE INVENTION
The aim of the invention is to provide a device of the kind mentioned in the introduction, which aligns rectangular sheets of a predetermined set of different sized sheets quickly and reliably with a predetermined side parallel to its feed direction.
In accordance with the invention, there is provided a device for aligning a sheet fed in a plane of alignment in a feed direction, comprising:
at least two drive groups which are controllable independently of each other, each drive group comprising a respective drive roller, the axes of the drive rollers extending transversely of the feed direction, and a respective pressure roller which contacts the respective drive roller generally in the plane of alignment so that the sheet can be driven between the drive roller and the respective pressure roller;
a position detector operable to detect an angle of twist of the sheet; and
a control device responsive to the position detector to adjust a local feed speed of each drive group in dependence upon the angle of twist of the sheet.
REFERENCES:
patent: 3603446 (1971-09-01), Maxey et al.
patent: 4163157 (1979-07-01), Guignard et al.
patent: 4438917 (1984-03-01), Janssen et al.
patent: 4833591 (1989-05-01), Eckl
patent: 4855607 (1989-08-01), Eckl
patent: 4971304 (1990-11-01), Lofthus
patent: 4987448 (1991-01-01), Chikama
patent: 5078384 (1992-01-01), Moore
patent: 5090683 (1992-02-01), Kamath et al.
patent: 5094442 (1992-03-01), Kamprath et al.
patent: 3441977 (1985-05-01), None
patent: 0206675 (1986-12-01), None
patent: 4163157 (1979-07-01), None
Fish & Richardson P.C.
Lee John R.
Mars Incorporated
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