The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 1980
Filed:
Mar. 27, 1978
Michael A Scott, Huntington, NY (US);
Albert E Brown, Glen Cove, NY (US);
Edward Young, Manhasset, NY (US);
Columbia Ribbon and Carbon Mfg. Co., Inc., Plainview, NY (US);
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.