Porous rubber stamp material having open cells

Details Porous rubber stamp material having open cells Porous rubber stamp material having open cells

1994-11-17

1997-04-15

Krynski, William

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428141, 428163, 428174, 4283044, 4283135, 428492, B32B 312

Patent

active

056207778

ABSTRACT:
A porous rubber stamp material having open cells is here disclosed which comprises a print layer 2 having a spring hardness of 30 to 40 and an ink-occluding layer 1 having a spring hardness of 10 to 20, and preferably, the ink-occluding layer 1 is provided with lugs 3. The porous rubber stamp material of the present invention can overcome faults of a conventional porous rubber stamp material having open cells and permits obtaining a very sharp imprint under any push pressure. Thus, the porous rubber stamp material of the present invention can be used for the continuous sealing of a private seal, an address seal, a date seal and the like.

REFERENCES:
patent: 5397417 (1995-03-01), Goto et al.
Physical Testing Method for Expanded Rubber, The Society of Rubber Industry, Japan Standard, SRIS 0101-1968 (English translation included).

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