B - Operations – Transporting – 44 – C
Patent
B - Operations, Transporting
44
C
B44C 1/24 (2006.01) B31F 1/07 (2006.01) B41M 3/14 (2006.01)
Patent
CA 2208087
The impression of the microengravings is achieved by means of an embossing process wherein the paper is passed through an embossing group (17, 18), consisting of an embossing cylinder (17) carrying said microengravings and a counterthrust cylinder (18), said process being carried out, after humidification of the paper, at a temperature and a pressure on the paper passing between said cylinders included within the ranges of 90-220 ~C and 20- 120 kg/mm2 respectively, preferably 130-170 ~C and 40-100 kg/mm2 respectively.
L'invention porte sur un procédé de gaufrage permettant l'impression de microgravures. Ce procédé consiste à faire passer le papier dans un appareillage de gaufrage (17, 18) constitué d'un cylindre à gaufrer (17) portant lesdites microgravures et d'un cylindre de contre-chevauchement (18). Après avoir humidifié le papier, on le fait passer entre les deux cylindres susmentionnés à une température comprise entre 90 et 220 ~C et sous une pression comprise entre 20 et 120 kg/mm?2¿ ou bien, de préférence, entre 130 et 170 ~C et 40 et 100 kg/mm?2¿, respectivement.
Gowling Lafleur Henderson Llp
Oranmay Investments B.v.
LandOfFree
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