.~.~ Including shutter, diaphragm, polarizer or filter
DEFINITION
Classification: 355/71
(under subclass 67) Subject matter including an opaque element which is insertable in the optical path to temporarily block the light or a diaphragm, polarizer, or filter in the optical path to partially block the light.
(1) Note. The diaphragms of this subclass are usually between the light source and the original and do not regulate the size of the final picture as do the masks in subclass 74 below which are between the original and the photosensitive paper.
SEE OR SEARCH THIS CLASS, SUBCLASS:
34, for a copier having a detailed diaphragm for copying lenticular film.
35+, for a device for copying multicolor pictures including a shutter, diaphragm, polarizer, or filter.
64+, for a copier which transfers images from individual documents to film strips having light control wherein the shutter is usually actuated by a document.
74, for a holder for the photosensitive paper having an adjustable mask over the paper. 101, for contact printing machine with shutters.
116, for contact printer light box with foot operated shutter.
