Photocopying – Projection printing and copying cameras – Detailed holder for original
Patent
1982-05-26
1984-01-17
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Detailed holder for original
355 77, G03B 2762
Patent
active
044261527
ABSTRACT:
A method and machine for positioning films on base sheets is disclosed. A first film on a base sheet is laid out into a desired position on a base plate, and positions of register marks attached on the first film are detected by photoelectric detectors including photoelectric elements which detect the register marks and output signals whose strengths are varied depending on the positions of the elements with respect to the register marks. Then, a second film on a base sheet is put on the first film so that the register marks on the second film, which are marked in the same positions as those of the first film, may approximately overlap those register marks of the first film, and the register marks of the second film become coincident with those of the first film by moving the second film by means of a drive means according to the output signals from the photoelectric elements, thereby positioning the second film into the desired position.
REFERENCES:
patent: 1625578 (1927-04-01), Tremper
patent: 3844655 (1974-10-01), Johannsmeier
patent: 3873202 (1975-03-01), Inoue
patent: 3876301 (1975-04-01), Kosugi et al.
Sakamoto Takashi
Sano Tetsuo
Dainippon Screen Seizo Kabushiki Kaisha
Hayes Monroe H.
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