Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1978-03-27
1980-08-12
Esposito, Michael F.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
427146, 4274125, 428914, B32B 326, B32B 518
Patent
active
042173884
ABSTRACT:
A thin, pressure-sensitive, ink-releasing transfer element such as a ribbon capable of releasing a substantially uniform and intense amount of smudge-resistant ink at least about four times from overlapping impressed areas of the ink layer corresponding to each double image width during high speed printing use on "hammer-impression" high speed typewriters. The thinness of the ribbon is important not only to accommodate a maximum amount of ribbon on the feed spool, but primarily in order to provide a ribbon which is operative in such typewriters to produce images having excellent sharpness, uniform intensity, edge profile and freedom from pick-over, which properties also result from the cooperative nature of the ink and undercoating used on such ribbons. The present method involves applying an ink layer comprising a microporous resinous binder containing pressure-exudable, substantially-solid, thixotropic ink having a viscosity of at least about 100,000 centipoises and containing a hydrophilic pigment and a wetting agent having both hydrophilic and oleophilic radicals, by means of a volatile coating vehicle comprising a miscible mixture of (a) a volatile liquid solvent which is a solvent for the resinous binder and for the ink vehicle but is a non-solvent for the wetting agent and (b) another less volatile liquid which is a solvent for the wetting agent and for the ink vehicle but is a non-solvent for the resinous binder.
REFERENCES:
patent: 3037879 (1962-06-01), Newman et al.
patent: 3080954 (1963-03-01), Newman et al.
patent: 3102824 (1963-09-01), Newman
patent: 3467539 (1969-09-01), Schlotzhauer et al.
patent: 3671287 (1972-06-01), Maniar
patent: 3904802 (1975-09-01), Brown et al.
patent: 4087579 (1978-05-01), Newman
patent: 4092456 (1978-05-01), Newman et al.
Brown Albert E.
Scott Michael A.
Young Edward
Childs Sadie L.
Columbia Ribbon and Carbon Mfg. Co., Inc.
Esposito Michael F.
Tully Thomas L.
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