Apparatus for controlling the quality of a picture which is to b

Details Apparatus for controlling the quality of a picture which is to b Apparatus for controlling the quality of a picture which is to b

1979-03-20

1981-09-08

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 77, G03B 2752, G03B 2732

Patent

active

042881579

ABSTRACT:
An apparatus for controlling the quality of a picture which is to be processed in a reproduction process, comprising a carrier and at least one measurement element applied to the carrier, said measurement element possessing at least one measurement symbol, the surface area of which is in a predetermined relationship with regard to the total surface area of the measurement element, and wherein the measurement symbol is subdivided into at least two non-contiguous parts or components or has a ring-shaped configuration. There is also disclosed a method of producing such apparatus wherein the measurement symbol is recorded in an enlarged scale and thereafter photographically reduced in size to the desired size.

REFERENCES:
patent: 3177763 (1965-04-01), Franqui
patent: 3204544 (1965-09-01), Shannon
patent: 3220301 (1965-11-01), Koonz et al.
patent: 3289530 (1966-12-01), Samain
patent: 3393618 (1968-07-01), Baker
patent: 3508826 (1970-04-01), Grabau
patent: 3620622 (1971-11-01), Goodwin
patent: 3861798 (1975-01-01), Kobayashi et al.

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