Abstract:
In an overprint stamp and its method, mesh points are used to produce a pattern on a surface of the overprint stamp, such that the stamp has a function similar to a portable color printer. After inks of different colors have gone through an overprint process, the colors gone through the overprint process produce the effects of different colors and different layers to produce colors similar to a color photo.
Abstract:
A printing material composed of an open-cell sponge rubber capable of including therein a colored ink, which does not necessitate a stamp pad for the stamping operation, is disclosed. This printing material is prepared by adding appropriate amounts of soluble starch and a fine powder of an easily water-soluble salt which does not decompose or gasify at a curing temperature to a mixture of a starting rubber, a curing agent and a filler, kneading and milling the mixture, introducing the mixture into a mold, heating the mixture to effect curing, removing said starch and salt by washing, and drying the resulting product.
Abstract:
A stamp for making multicolor prints comprises a downwardly open housing in which two superposed square blocks are vertically reciprocable, each block being independently rotatable about a horizontal axis. The upper block, held in a yoke at the lower end of a manually depressible plunger, carries differently colored ink pads on its four faces; the sides of the lower block are typefaces representing differently colored components of a composite design to be printed on a substrate. Depression of the plunger brings the top typeface of the lower block into contact with the ink pad on the bottom face of the upper block whereupon both blocks can be jointly moved down against a spring force to thrust the previously inked bottom typeface against the substrate. Upon the subsequent ascending stroke, the two blocks are separated and rotated codirectionally by one-way rack-andpinion drives to confront the next typeface with the next ink pad. A pawl-and-ratchet coupling between the plunger and the housing prevents premature separation of the blocks upon release of the plunger in an intermediate position of descent.