Sheet registration method and apparatus for calculation of delay

Details Sheet registration method and apparatus for calculation of delay Sheet registration method and apparatus for calculation of delay

1989-12-27

1991-05-28

Grimley, A. T.

Sheet feeding or delivering

Feeding

With means to align sheet

271227, 271270, 355317, B65H 904, G03G 2100

Patent

active

050187180

ABSTRACT:
A method of controlling print positioning comprises the steps of: detecting the time which elapses until a sheet of paper reaches a given position; predicting the time which would elapse until the paper reaches an image transfer position on the basis of the time detected in the detection step; calculating the time difference between the predicted time and an elapse time calculated on the basis of a paper carrying speed pattern which is previously stored and has at least two speeds; and controlling the paper carrying speed so that the calculated time difference becomes zero, thereby preventing any misregistration between a toner image and the paper.

REFERENCES:
patent: 3930725 (1976-01-01), Jones et al.
patent: 4025187 (1977-05-01), Taylor et al.
patent: 4416534 (1983-11-01), Kluger
patent: 4519700 (1985-05-01), Barker et al.

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