Geometrical instruments – Miscellaneous – Light direction
Patent
1982-08-30
1984-10-09
Stearns, Richard R.
Geometrical instruments
Miscellaneous
Light direction
G01B 500
Patent
active
044752881
ABSTRACT:
A registry device is described having a transparent cover having positioning indicia thereon and an underlying substrate between which printed copy may be placed for determining alignment corrections. Preferably a spacer lies between the cover and the substrate which is preferably approximately the thickness of the copy whose printing alignment is to be determined using the device. Most preferably, the spacer is a reference guide against which a sheet of copy may be placed when determining alignment, using the markings on the second substrate, although the reference guide may be separated from the spacer, or used in place of the spacer.
REFERENCES:
patent: 509073 (1893-11-01), Drake et al.
patent: 1205879 (1916-11-01), Felten
patent: 2375427 (1945-05-01), Mannino
patent: 2693035 (1954-11-01), Beck
patent: 2720028 (1955-10-01), Wolf
patent: 2992484 (1961-07-01), May
patent: 3024692 (1962-03-01), Skeggs
patent: 3968574 (1976-07-01), Ellis
patent: 4262422 (1981-04-01), Pass
Easalign, Ltd.
Stearns Richard R.
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