Copying apparatus with moveable screen and method

Details Copying apparatus with moveable screen and method Copying apparatus with moveable screen and method

1990-01-03

1991-10-08

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355 71, 355246, 355326, G03G 2100

Patent

active

050558773

ABSTRACT:
A copying apparatus in which a screen for improving gradation characteristics of a copied image can be retractably projected into an optical path, including a device for setting, when the screen is placed in the optical path and retracted from the optical path, a developing voltage to a first value and a second value, respectively such that the first value is lower than the second value.

REFERENCES:
patent: Re32330 (1987-01-01), Miyakawa et al.
patent: 3580671 (1971-05-01), Lavander
patent: 4066351 (1978-01-01), Kidd
patent: 4128329 (1978-12-01), Kawano
patent: 4697920 (1987-10-01), Palm et al.
patent: 4821076 (1989-04-01), Toyoshi et al.
patent: 4901104 (1990-02-01), Sakakibara
Japanese Abstract, vol. 9, No. 265 (P-399) (1988) 10/23/85.
Japanese Document A 60113229 (Toshiba).
Japanese Abstract, vol. 8, No. 282 (P-323) (1719) 12/22/84.
Japanese Document A 59148069 (Matsushita Denki Sangyo) 8/24/84.

Affiliated with

Also associated with

Rating

Copying apparatus with moveable screen and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copying apparatus with moveable screen and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copying apparatus with moveable screen and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-260105