Carbonless transfer sheets for multi-part forms packs

Details Carbonless transfer sheets for multi-part forms packs Carbonless transfer sheets for multi-part forms packs

1988-06-17

1990-09-25

Schwartz, Pamela R.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

162126, 162134, 162135, 162137, 427150, 427151, 427152, 428211, 4285375, 428914, 503214, 503215, 503226, B41M 522

Patent

active

049593439

ABSTRACT:
Pressure sensitive carbonless transfer sheets are made capable of producing clear images by light impact marking means in multi-part carbonless forms packs containing at least six of the sheets, such as 8-12 sheets, by coating a chromogenic material onto a paper sheet characterized by a basis weight of 9-12 lbs of a ream of 500 sheets of paper each having dimensions of 17 by 22 inches, a thickness of 40-50 microns, a Gurley porosity of 400-4000 seconds, and a Bendtsen smoothness of 90-260 ml/min on the wire side and 60-280 ml/min on the felt side. Bar codes are also transferrable with good scannability through forms packs containing three or more sheets.

REFERENCES:
patent: 4416939 (1983-11-01), Igarashi et al.
patent: 4466007 (1984-08-01), Nakamuka et al.
patent: 4912080 (1990-03-01), Weinstein

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