Scanning exposure-reproduction apparatus and scaling reproductio

Details Scanning exposure-reproduction apparatus and scaling reproductio Scanning exposure-reproduction apparatus and scaling reproductio

1991-11-20

1993-08-17

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Original moves continuously

355 57, 355 60, 355 61, 355234, 355243, G03B 2748, G03B 2750, G03B 2770

Patent

active

052373665

ABSTRACT:
When an input reproduction scale m is equal to a value mla which lies in a reproduction scale section ml, rated moving speeds Ula and U2a corresponding to the reproduction scale m and a resonance point avoidance coefficient kl (=1) are read in, and practical moving speeds Vla (=kl.times.Ula=Ula) and V2a (=k1.times.U2a=U2a) of a holder 2 and a cylindrical drum 10 are determined with the above data. On the other hand, when the input reproduction scale m is equal to a value m2b which lies in another reproduction scale section m2, rated moving speeds Ulb and U2b corresponding to the reproduction scale m and a resonance point avoidance coefficient k2 (.noteq.1) are read in, and practical moving speeds Vlb (=k2.times.Ulb.noteq.U1b) and V2b (=k2.times.U2b.noteq.U2b) are determined with the above data. While the reproduction scale corresponding to the ratio of the practical moving speeds V1b and V2b is maintained equal to the input reproduction scale m2b, the practical moving speed Vlb is set as a moving speed of a movable speed area IB which lies outside a non-use speed area IA.

REFERENCES:
patent: 4782364 (1988-11-01), Takagi
patent: 4903079 (1990-02-01), MacAndrew
Patent Abstracts of Japan vol. 14, No. 160, Mar. 1990 & JP-A-20 16 582.

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