CH605153

• Main Author: FREDERICK C. HANSEN
• Format: Patent
• Language: English
• Published: 29.09.1978
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING MACHINES OR PRESSES; PRINTING PLATES OR FOILS; PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTINGSURFACES; STAMPING OR NUMBERING APPARATUS OR DEVICES; STAMPS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYPEWRITERS; WORKING-UP

A marking structure for various uses, such as in hand stamps or other printing members, or in ink pads, ink rolls or other inking members. The marking structure is characterized by at least two layers, including an outer layer and an underlying reservoir layer. The outer layer has interconnected aggregates of thermoplastic resin, forming a microporous network of pores, and a marking fluid contained within the network. The reservoir layer has an open-pored macroporous structure, such as an open-cell polyurethane foam, impregnated with a microporous thermoplastic resin, in the form of interconnected aggregates, and an additional amount of the marking fluid. The resin aggregates of the outer and reservoir layers are joined at the interface of the layers to form a cohesive structure.