Larger sizes made to order.
When ordering Copying Camera, please give length of cone, if that is needed.
The S. & A. Photo-Engravers' Adjustable Screen
Plate Holder.
(Patent applied for.)
This Holder, as is shown in the cut above, is a great improvement over any heretofore manufactured for photo-engraving purposes. Its principal points of superiority are, briefly:
First.—The ease with which it is adjusted for different size plates and screens, by a simple sliding movement of the two inside frames to or from the centre, and thus dispensing with the expensive and troublesome use of kit frames.
Second.—The convenience by which the screen plate is accurately adjusted to the sensitized plate by means of the metallic sliding adjusters. (Heretofore it has been necessary to do the adjusting by means of inserting different thicknesses of cardboard, paper, etc.)
Third.—Different thicknesses in the screen plates are allowed for by means of a spring which always holds the plate in accurate place, no matter what its thickness may be.