Roll film mark counter

Details Roll film mark counter Roll film mark counter

1974-02-07

1976-03-02

Thesz, Jr., Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92MP, 235 92PE, 235 92R, 353 26R, G06M 302, G03B 2312

Patent

active

039419819

ABSTRACT:
A mark counter is able to count frame marks in one film margin adjacent to corresponding frames and group marks in the other film margin adjacent to the first frames of each group of frames regardless of which margin contains the frame marks and which margin contains the group marks. The marks in both margins are sensed, and analogous signals are fed into an OR gate and an AND gate. The output of the OR gate is the logical sum of the number of sensed frame and group marks which is numerically equal to the number of sensed frame marks, and the output of the AND gate is the logical product of the number of sensed frame and group marks which is numerically equal to the number of sensed group marks.

REFERENCES:
patent: 3299272 (1967-01-01), Yozofurukawa et al.
patent: 3673389 (1972-06-01), Kapsambelis et al.
patent: 3689742 (1972-09-01), Yoshiharukagari
patent: 3778630 (1973-12-01), White et al.
patent: 3820884 (1974-06-01), Yoshiakisone

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