Handbook of lithography : a practical treatise for all who are interested in the process by Cumming David 1846-1922

Author:Cumming, David, 1846-1922
Language: eng
Format: epub, pdf
Tags: Lithography
Publisher: London : A. & C. Black
Published: 1904-03-25T05:00:00+00:00

Fig. 15. SHOWING SPRING ARRANGEMENT FOR OBTAINING PRESSURE.

HANDBOOK OP^ LITHOGRAPHY

cylinder, the latter is raised just as much as the upper part of the bush is shown to be raised from the under part at the point E in Fig. 15. This should not exceed one-sixteenth of an inch. An increase of pressure may be obtained by causing the stone to raise the cylinder a little more, but this is not advisable. If circumstances

really make it necessary to have more pressure, it may be obtained by pressing down the spring to a greater degree of tension by means of the screw I). In some later machines of a large size there are two springs at each side which give a much greater resisting power.

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