Abstract: Provides is a seal surface carving apparatus capable of carving a seal surface using only a single attachment irrespective of a size of a stamp. A porous impression die having a seal surface to be carved is set on a dedicated attachment, and is loaded in a seal surface carving apparatus. A fitting projection fit to a bottom portion of the impression die is formed on the attachment, and impression dice having various sizes may be set. In addition, a slit hole extending in a conveyance direction is formed in an impression die setting portion of the attachment. Impression die size determination means of the seal surface carving apparatus determines a size of the impression die by detecting a position at which the impression die blocks the slit hole.

Abstract: Self-inking stamp comprises: a porous marking block; an ink storage body disposed on an upper surface of the porous marking block; an absorber disposed on an upper surface of the ink storage body and configured to generate a capillary force less than that of the ink storage body, and absorb excess ink from the ink storage body; an ink tank comprising an ink supply tube having an open distal end connected to the ink storage body; a wall member covering an outer lateral peripheral surface of the ink storage body in such a manner as to prevent ink leakage; an ink outlet opening provided in a part or an entirety of a lower surface of the ink storage body; and an air passage opening provided in at least a part of an outer lateral peripheral surface of the absorber in communicating relation with atmospheric air.

Abstract: A self-inking stamp is configured such that, in a marking preparation state, a marking member is maintained in a state in which it is oriented upwardly within a stamp body of the self-inking stamp and pressed against an ink pad to supply ink thereto, and, during a marking operation, after the inner frame is moved downwardly while being reversingly rotated and oriented downwardly, the downwardly-oriented marking member is exposed from the stamp body and enabled to make a mark. The self-inking stamp is also configured to lock the marking member in a state in which it is exposed from the stamp body, for replacement and cleaning of the marking member.

Abstract: The present invention relates to a porous stamp assembly. The manufacturing method of the assembly comprises a first step of hermetically adhering a porous impression die member of thermoplastic resin to a front end face of a frame; a second step of fixing the die member embedded frame onto a mount that is to be in face-to-face relation with a thermal head attached to a seal carving device; a third step of putting the thermal head in contact with an impression surface of the porous impression die member, with a resin film interposed therebetween, and moving the thermal head and the porous impression die member relative to each other; and a fourth step of removing the die member embedded frame from the mount.

Abstract: A self-inking stamp is configured such that, in a marking preparation state, a marking member is maintained in a state in which it is oriented upwardly within a stamp body of the self-inking stamp and pressed against an ink pad to supply ink thereto, and, during a marking operation, after the inner frame is moved downwardly while being reversingly rotated and oriented downwardly, the downwardly-oriented marking member is exposed from the stamp body and enabled to make a mark. The self-inking stamp is also configured to lock the marking member in a state in which it is exposed from the stamp body, for replacement and cleaning of the marking member.

Abstract: An invertible ink stamp comprises an ink absorber/retainer member disposed on top of the ink pad, an absorbent member disposed on the top of the ink absorber/retainer member and having capillary attraction weaker than that of the ink absorber/retainer member but sufficient to absorb excessive ink, the absorbent member having a vent in at least part of the top side or either of lateral sides for conducting to the atmospheric air, an ink tank having an ink supply tube that has its distal open end connected to the ink absorber/retainer member, and a wall member surrounding the whole circumferential surface of the ink absorber/retainer member for avoiding leakage of ink.

Abstract: A method of producing a porous molded part includes a mixing process for mixing a granular porous organizer composed of a water-soluble compound, a porous forming assistant agent composed of a polyhydric alcohol, and a cross-linking agent composed of an organic peroxide with a thermoplastic resin composition having a glass transition temperature below 0° C. to obtain a molding material; a cross-linking and forming process for placing the molding material in a molding die and performing a heat press molding thereby progressing coincidentally a cross-linking reaction and a shape forming of a seal face to obtain a molded material; an extracting process for extracting the granular porous organizer from the molded material obtained in the cross-linking and forming process to obtain a porous molded part; and a drying process for drying the porous molded part obtained in the extracting process.

Abstract: Self-inking stamp comprises: a porous marking block; an ink storage body disposed on an upper surface of the porous marking block; an absorber disposed on an upper surface of the ink storage body and configured to generate a capillary force less than that of the ink storage body, and absorb excess ink from the ink storage body; an ink tank comprising an ink supply tube having an open distal end connected to the ink storage body; a wall member covering an outer lateral peripheral surface of the ink storage body in such a manner as to prevent ink leakage; an ink outlet opening provided in a part or an entirety of a lower surface of the ink storage body; and an air passage opening provided in at least a part of an outer lateral peripheral surface of the absorber in communicating relation with atmospheric air.

Abstract: A self-inking stamp is configured such that, in a marking preparation state, a marking member is maintained in a state in which it is oriented upwardly within a stamp body of the self-inking stamp and pressed against an ink pad to supply ink thereto, and, during a marking operation, after the inner frame is moved downwardly while being reversingly rotated and oriented downwardly, the downwardly-oriented marking member is exposed from the stamp body and enabled to make a mark. The self-inking stamp is also configured to lock the marking member in a state in which it is exposed from the stamp body, for replacement and cleaning of the marking member.

Abstract: A method of producing a porous molded part includes a mixing process for mixing a granular porous organizer composed of a water-soluble compound, a porous forming assistant agent composed of a polyhydric alcohol, and a cross-linking agent composed of an organic peroxide with a thermoplastic resin composition having a glass transition temperature below 0° C. to obtain a molding material; a cross-linking and forming process for placing the molding material in a molding die and performing a heat press molding thereby progressing coincidentally a cross-linking reaction and a shape forming of a seal face to obtain a molded material; an extracting process for extracting the granular porous organizer from the molded material obtained in the cross-linking and forming process to obtain a porous molded part; and a drying process for drying the porous molded part obtained in the extracting process.

Abstract: The present invention relates to a porous stamp assembly. The manufacturing method of the assembly comprises a first step of hermetically adhering a porous impression die member of thermoplastic resin to a front end face of a frame; a second step of fixing the die member embedded frame onto a mount that is to be in face-to-face relation with a thermal head attached to a seal carving device; a third step of putting the thermal head in contact with an upper major surface of the porous impression die member, with a resin film interposed therebetween, and moving the thermal head and the porous impression die member relative to each other; and a fourth step of removing the die member embedded frame from the mount.

Abstract: A porous stamp material allows only resin in a region thereof irradiated with a laser beam during laser engraving in a production process of an ink stamp to be burnt and vaporized while preventing melting in any other unwanted region. The porous material for ink stamps comprises: at least one thermoplastic resin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-alpha-olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene-acrylic copolymer; at least one thermoplastic elastomer selected from a plurality of different hydrogenated styrene based thermoplastic elastomers; and at least one filler selected from a plurality of different inorganic compounds, wherein the thermoplastic resin and/or the thermoplastic elastomer are cross-linked, and formed in a continuous pore structure.

Abstract: An invertible ink stamp comprises an ink absorber/retainer member disposed on top of the ink pad, an absorbent member disposed on the top of the ink absorber/retainer member and having capillary attraction weaker than that of the ink absorber/retainer member but sufficient to absorb excessive ink, the absorbent member having a vent in at least part of the top side or either of lateral sides for conducting to the atmospheric air, an ink tank having an ink supply tube that has its distal open end connected to the ink absorber/retainer member, and a wall member surrounding the whole circumferential surface of the ink absorber/retainer member for avoiding leakage of ink.

Abstract: One object of the present invention is to provide a self-inking stamp which can easily perform replacement of a character arrangement block or an ink pad without sudden release of locked condition of the stamp during the replacement operation.

Abstract: An endless print belt for rotary stamp in which a plurality of print sections are disposed and spaced-out between each other on a surface of a print belt main body, with at least the print surface of the print section being formed of porous material, wherein a groove in the width direction is formed at an intermediate position of each spaced-out part. Preferably, the spaced-out part is formed such that the surface thereof is in a non-porous state and both ends of the groove are formed into a bund part, for preventing ink from running out.

Abstract: In a rotary stamp with master stamp incorporating a master stamp having an oblong hole from which a desired print section of a rotary stamp is exposed in the bottom part of a grip case containing the rotary stamp, a thin melt-processed laminated belt produced by treating the superficial layer of a laminated belt foundation composed of porous thermoplastic resin belt base and an ink circulation reinforced rear fabric such that only a print section is left in a porous state while the other part of the belt is melt processed into anon-porous state that is used as an endless print belt, with the oblong hole in the master stamp formed in a size which allows the belt to pass along a bridge part without the surfaces making contact therewith.