Macroporous microporous marking structure
US3971315A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1974 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Aug 12, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249996
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.