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US4058085A Expired / Lapsed US ⏱️ 0.0 years remaining

Stamp pad

Assignee: Individual
•
Filing: 1975-11-19
•
Granted: 1977-11-15
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Expires: 1995-11-19
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Abstract

Abstract A hi-fi stamp pad comprising a pad vessel, a substrate whereupon a kind of fiber is vertically planted and thus a flock surface formed thereon, a bolster which is buried under the substrate and contained in the pad vessel whereby to hold ink for stamp use, and a ringlet compulsively rounded the inner brink of the pad vessel to set steadily the substrate upon the bolster. Being first filtered through the substrate, the ink is absorbed upward from the bolster by the flock and accordingly, appropriately wets the flock surface thereof. Once a stamp or seal touches the flock surface, the latter brushes the ink evenly upon the engraved character surface and breaks the ink surface tension built thereupon whereby to regulate the ink adhesion and to make the stamped characters very clear.

Inventors

  • 👤 Teh-Tsao Yang

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 04:08
CPC Classifications
B; B41; B41K; B41K1/00; B41K1/36; B41K1/38; B41K1/54

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 175 words
A stamp pad comprising: a. a pad vessel having a ring-shaped upturned edge; b. a bolster contained in said pad vessel for soaking and holding ink for stamp use; c. a substrate with flock perpendicularly planted thereon to form the pad surface placed on top of said bolster in said vessel, said flock drawing ink from said bolster upward through said substrate by capillary action and retaining said ink, said ink being filtered by said substrate, said flock being evenly wetted thereby, said surfae being formed so that when a stamp or seal presses upon said pad surface said flock brushes ink evenly on the stamp character surface and breaks the ink surface tension avoiding superficious adhesion of ink on the stamp surface, said flock forming a spiny surface to clean out the dust and waste jammed in and on the engraved characters allowing the printing of a neat and clear seal; and d. a ringlet forced under compression into said ring-shaped upturned edge of said pad vessel to retain said substrate on said bolster.
Claim 2
Dependent Claim 175 words
A stamp pad comprising: a. a pad vessel having a ring-shaped upturned edge; b. a bolster contained in said pad vessel for soaking and holding ink for stamp use; c. a substrate with flock perpendicularly planted thereon to form the pad surface placed on top of said bolster in said vessel, said flock drawing ink from said bolster upward through said substrate by capillary action and retaining said ink, said ink being filtered by said substrate, said flock being evenly wetted thereby, said surfae being formed so that when a stamp or seal presses upon said pad surface said flock brushes ink evenly on the stamp character surface and breaks the ink surface tension avoiding superficious adhesion of ink on the stamp surface, said flock forming a spiny surface to clean out the dust and waste jammed in and on the engraved characters allowing the printing of a neat and clear seal; and d. a ringlet forced under compression into said ring-shaped upturned edge of said pad vessel to retain said substrate on said bolster.
Claim 3
Dependent Claim 23 words
A stamp pad according to claim 1, wherein said flock consists of a kind of fiber, and said substrate a kind of textile.
Claim 4
Dependent Claim 18 words
A stamp pad according to claim 1, wherein said pad vessel, said bolster, and said substrate are disc-shaped.

References Cited (Backward Citations)

US425834A Cited
US1690275A Cited
US1709182A Cited
US3669071A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-11-14 1981-05-16 1981-11-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-11-14 1985-05-16 1985-11-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-11-14 1989-05-16 1989-11-15 $7700.00 Window Closed / Lapsed

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