Material which is used to form a visible record by a reactive
or interactive, usually chemical or physico-chemical, phenomenon or a method of using such a material to form a record. The formation phenomenon is one of the following: (a) The chemical decomposition of a colorless substance to form a substance having color; (b) the chemical combination of two or more colorless chemical moieties to produce a substance having color; (c) The further chemical change of (a) or (b) above, to form a color different from an original color; and (d) The chemical or physico-chemical complementarity between the bottom surface of one sheet of a record receiver and the top surface of an adjacent sheet with which the first sheet id associated.
Generally, the phenomenon in cases (a) through (d) is thought about by the application to the record receiver of heat and/or pressure in the areas to be "marked".
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS
346, Recorders,
134+, for record receivers of other type and the definitions to that subclass for the identity of other classes or subclasses where other record receivers may be placed.
427, Coating Processes, appropriate subclasses for a method of making a record receiver as herein, by coating substrate, and especially
213.3+, for a process of making a solid microcapsule by coating. 428, Stock Material or Miscellaneous Articles,
402.2+, and 402.24 for composite microcapsules; and subclasses 411.1+ for composite material in general, many of which may be used in or as record receivers; see especially subclasses 488.1+ for so-called "carbon paper", and some other paper coated with transferable material.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclass for radiation-sensitive (photos:graphic) materials in general, including those intended to be used for making a record by imagewise exposure to a radiant heat source, e.g., a laser. Where a receiver is claimed which can function due to conductive imagewise heating or radiant imagewise heating, the patent is classified in Class 430 and cross-referenced here (Class 503).
462, Books, Strips, and Leaves for Manifolding, see especially
17+, 55+ and 66+ for plural leaf paper sets including transfers and receiving sheets.