Mask device for photocomposing machines

Details Mask device for photocomposing machines Mask device for photocomposing machines

1979-11-08

1981-05-12

Griffin, Donald A.

G03B 1706

Patent

active

042668646

ABSTRACT:
The character disc of the photocomposing machine has a "sandwich" construction in which the characters are located close to one another on a piece of film which is "sandwiched" between two glass plates. The thickness of this construction is such that the mask would have to be located very precisely in order to select only one character. The mask device consists of a pair of shields, a front shield located between the flash lamp and the spinning disc character matrix, and a rear shield between the matrix and the character magnification lens system. Preferably, the shields are close to the matrix and are fastened together. Each shield has an aperture. The aperture in the front shield preferably is larger than that in the rear shield so that the rear shield blocks rays missed by the front shield. The use of the two shields greatly reduces the precision required in the location of the mask over that required if only one shield were used.

REFERENCES:
patent: 2846932 (1958-08-01), Hooven et al.
patent: 3813683 (1974-05-01), Purdy et al.
patent: 3886566 (1975-05-01), Moyroud et al.
patent: 4027313 (1977-05-01), Klepper et al.
patent: 4063812 (1977-12-01), Abraham et al.

Affiliated with

Also associated with

Rating

Mask device for photocomposing machines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mask device for photocomposing machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mask device for photocomposing machines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2043800