Document Type and Number:
Japanese Patent JP3891632
PROBLEM TO BE SOLVED: To obtain a stamp seal not accompanying oozing or running of ink by melting a thermoplastic resin through projection of infrared rays to a surface of a printing body formed by kneading a heat-generating material, thereby forming a stamp face and a reinforcing part, butting the reinforcing part of the printing body to a holding element of a receiving member and fitting and holding the reinforcing part to an outer circumferential step part.
SOLUTION: A polyolefin resin is heated and softened, kneaded with salt and a heat-generating material, and dispersed. The polyolefin resin is press molded, cut into a square, and soaked in water, so that salt is dissolved from the polyolefin resin. The polyolefin resin is then dried, whereby a printing body 1 is obtained. A stamp face and a reinforcing part 9 are formed on a surface of the printing body 1 by melting a thermoplastic resin through projection of infrared rays. The printing body 1 is arranged from a small opening end of a receiving member 6 to a receiving main body 3 and fitted and held to the receiving main body 3. At this time, an outer circumferential part of the printing body 1 bites as the reinforcing part 9 into a pull part 8. A height H of the pull part 8 and a thickness T of the reinforcing part 9 always hold a relation H<T.
December 15, 2006
February 28, 1997
B41K1/50; B41C1/055; B41K1/00; B41C1/055; (IPC1-7): B41K1/50; B41C1/055