Gas separation: apparatus – Magnetic separating means
Patent
1976-06-30
1977-04-05
Klein, David
Gas separation: apparatus
Magnetic separating means
G03G 1700, G03G 1300
Patent
active
040159833
ABSTRACT:
A fracturable manifold image is created in an imaging layer sandwiched between donor and receiver sheets by a conventional manifold imaging process using an imaging electrostatic field of a predetermined voltage. The fracturable manifold image is erased by uniformly applying in the dark a second electrostatic field of the same polarity as the first field but of sufficiently greater strength to cause substantially the entire imaging layer to preferentially adhere to one of the sheets. After the fracturable image has been created, but before erasure, the sandwich can be separated while still under the influence of the first field to provide a positive image on one sheet and a negative image on the other sheet and then reassembled substantially in registration. Subsequent such images can be made and erased provided that the imaging field for each subsequent image has at least the strength of the next previous erasure field.
REFERENCES:
patent: 3438772 (1969-04-01), Gundlach
patent: 3573904 (1971-04-01), Clark
patent: 3653892 (1972-04-01), Gundlach et al.
patent: 3655372 (1972-04-01), Krohn et al.
patent: 3676116 (1972-07-01), Krohn et al.
patent: 3692518 (1972-09-01), Reinis et al.
patent: 3761258 (1973-09-01), Menz
patent: 3861910 (1975-01-01), Kropac et al.
Maltz Martin S.
Schoonover Philip C.
Kenemore Max J.
Klein David
Miller John R.
Ralabate James J.
Tomlin Richard A.
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