A stamp and a process of producing a printing plate for a stamp

Details A stamp and a process of producing a printing plate for a stamp A stamp and a process of producing a printing plate for a stamp

B - Operations, Transporting

41

K

B41K 1/50 (2006.01) B41C 1/055 (2006.01)

Patent

CA 2150544

The present invention is to provide a stamp as well as to a process of producing a printing plate for a stamp which is made of a sponge having open cells thereby allowing repeated impressing operations to be done without supplying stamp ink for a long time. A producing process of a printing plate for a stamp of the present invention includes the steps of: fitting a heat-fusing ink sheet or a heat-generating plate containing a heat-generating material, over the surface of a stamp-piece having open cells therein; making a liquid substance soak a manuscript having characters, patters etc., represented by non-applied areas of recording material and applied areas of recording material; placing the manuscript over the top in such a manner that the impress original image may appear to be a mirror image; and irradiating the manuscript from thereabove with light so as to cause light passing through the non-applied areas of recording material to increase the temperature of the heat-generating material at corresponding sites to the non-applied areas of recording material whereby the generated heat of the heat-generating material corresponding to the non-applied portion of recording material fuses the surface part of the stamp-piece, or the heat-fusing ink of the heat-fusing ink sheet is fused to permeate the surface layer as well as to fuse the surface layer, thereby forming non-oozing areas of stamp ink while the stamp surface portion corresponding to the applied areas of recording material is not fused, thus forming oozing areas of stamp ink.

La présente invention se rapporte à un timbre ainsi qu'à un procédé pour la fabrication d'une planche d'impression d'un timbre qui est fabriquée en éponge à alvéoles ouverts, ce qui permet la répétition des opérations d'impression sans nécessité de fréquents réapprovisionnements en encre. Le procédé pour la fabrication d'une planche d'impression d'un timbre visé par la présente comporte les étapes suivantes : ajustement d'une feuille enduite d'encre thermofusible ou d'une planche à thermotransfert contenant un matériau calogène sur la surface d'un timbre en éponge à alvéoles ouverts; trempage dans une substance liquide d'un manuscrit comportant des caractères, des motifs, etc. représentés par des éléments non imprimants et des éléments imprimants; mise en place du manuscrit sur le dessus du timbre de telle sorte que l'image originale imprimée apparaisse sous forme d'image symétrique; irradiation du manuscrit par une lumière de manière à ce que la lumière traverse les zones non imprimantes pour augmenter la température du matériau calogène dans des zones correspondant aux éléments de non impression, de sorte que la chaleur produite par le matériau calogène correspondant à la zone non imprimante fusionne la partie surface du timbre, ou que l'encre thermofusible de la feuille enduite d'encre thermofusible soit fusionné de manière à imprégner la couche superficielle tout en la fusionnant, formant ainsi des zones sans suintement tandis que la portion de surface du timbre correspondant aux zones d'impression n'est pas fusionnée, créant ainsi des zones de suintement de l'encre.

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