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Current content: 156 511 693 patent documents

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200 241 new documents added

1 026 356 documents amended

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EP 0015133 A3 19801015 - PRESSURE SENSITIVE COPYING SYSTEM

Title (en)

PRESSURE SENSITIVE COPYING SYSTEM

Publication

EP 0015133 A3 19801015 (EN)

Application

EP 80300466 A 19800219

Priority

JP 1875079 A 19790220

Abstract (en)

[origin: EP0015133A2] A pressure sensitive copying system having comparatively uniform thickness and resistant to smudging, which is suitable for spot-coated copying sheets such as chit is obtained by disposing a color forming components layer on the layer of a microcapsule protective agent which has been provided all over the paper sheet, at least one of the components being enclosed in microcapsules.

IPC 1-7

B41M 5/16; B41M 5/22

IPC 8 full level

B41M 5/124 (2006.01)

CPC (source: EP)

B41M 5/1243 (2013.01)

Citation (search report)

FR 1551752 A 19681227
FR 2170687 A5 19730914 - WIGGINS TEAPE RES DEV [GB]

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0015133 A2 19800903; EP 0015133 A3 19801015; JP S55111288 A 19800827; JP S6228000 B2 19870617

DOCDB simple family (application)

EP 80300466 A 19800219; JP 1875079 A 19790220