EP 0997313 A1 20000503 - Rubber stamp element and production method thereof
Title (en)
Rubber stamp element and production method thereof
Title (de)
Gummistempel und Herstellungsverfahren dafür
Title (fr)
Tampon en caoutchouc et méthode de fabrication de celui-ci
Publication
Application
Priority
JP 31101098 A 19981030
Abstract (en)
A rubber stamp element is composed of, at least, two layers, i.e. a continuous-foam sponge rubber layer and a rubber layer, wherein the continuous-foam sponge rubber layer has a spring hardness of 15 to 35. This rubber stamp element is produced by the steps of: laying an unvulcanized rubber sheet (A) having a rubber composition including raw rubber, a vulcanizing agent and a filler, over another unvulcanized rubber sheet (B) having a sponge-type rubber composition including raw rubber, a vulcanizing agent, a filler and a water-soluble powder; heating and compressing them so as to be integrated; making the rubber layer (B) porous by treating the integrated structure with water; and carving the surface of either the (A) layer or the (B) layer of the integrated structure using a laser beam. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
Citation (search report)
- [X] US 5397417 A 19950314 - GOTO KAZUMI [JP], et al
- [XA] US 5620777 A 19970415 - GOTO KAZUMI [JP], et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99121387 A 19991027