US4228736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing apparatus
Assignee: Individual
•
Filing: 1978-07-28
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Granted: 1980-10-21
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Expires: 1998-07-28
Abstract
Abstract A printing apparatus has a holder which incorporates a permanent magnet and has a printing element or elements containing magnetically soft material. In use a printing element is held against a thin positioning portion by the attraction of the permanent magnet. To engage a printing element the printing element is placed in contact with the positioning portion and the permanent magnet is brought up to the positioning portion. To release a printing element the permanent magnet is moved away from the positioning portion. Printing elements may be aligned printing-face down in an aligning member. The printing elements have depicted on the face opposite the printing surface the character on the printing surface. In one version a printing apparatus is used as a hand-stamp, and in another version a printing apparatus is inked and used by hand-rolling.
Inventors
- 👤 John B. Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:46
CPC Classifications
B; B41; B41K; B41K1/00; B41K1/02; B41K1/04; A; A63; A63H; A63H33/00; A63H33/30; A63H33/3083
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
322 words
Printing apparatus comprising, a set of printing elements, each printing element bearing a printing surface and containing magnetically soft material, each printing element of the said set having substantially the same height and thickness as each other, each printing element having on the surface opposite the printing surface a depiction of the design to be printed, a holder including a permanently magnetised portion with poles and a relatively moveable positioning portion, said positioning portion bearing an integral number of channels and covering at least one pole of the permanently magnetised portion, a said channel being shaped such that printing elements arranged side by side fit against the channel with their printing surfaces proud of positioning portion, the positioning portion being movable between two positions, a first printing element holding position in which said permanently magnetized portion is positioned adjacent said channels of said channels of said positioning portion to magnetically hold said printing elements, and a second printing element releasing position in which the permanently magnetized portion is moved a distance from the channel of said positioning portion sufficient to release the printing elements from the hold of the permanently magnetized portion, and an aligning means, comprising a number of aligning channels along which printing elements locate slideably, side by side, with said depictions exposed, the printing apparatus being such that printing elements are set in the holder by placing printing elements on the aligning means, fitting the positioning portion over the printing elements and moving the permanently magnetised portion relative to the positioning portion to said first position in which printing elements are held magnetically against the positioning portion, printing elements being released from the holder back to the aligning means by locating the holder with attached printing elements on the aligning means and moving the permanently magnetised portion relative to the positioning portion to a second position in which the printing elements are not held magnetically against the positioning portion.
Claim 2
Dependent Claim
322 words
Printing apparatus comprising, a set of printing elements, each printing element bearing a printing surface and containing magnetically soft material, each printing element of the said set having substantially the same height and thickness as each other, each printing element having on the surface opposite the printing surface a depiction of the design to be printed, a holder including a permanently magnetised portion with poles and a relatively moveable positioning portion, said positioning portion bearing an integral number of channels and covering at least one pole of the permanently magnetised portion, a said channel being shaped such that printing elements arranged side by side fit against the channel with their printing surfaces proud of positioning portion, the positioning portion being movable between two positions, a first printing element holding position in which said permanently magnetized portion is positioned adjacent said channels of said channels of said positioning portion to magnetically hold said printing elements, and a second printing element releasing position in which the permanently magnetized portion is moved a distance from the channel of said positioning portion sufficient to release the printing elements from the hold of the permanently magnetized portion, and an aligning means, comprising a number of aligning channels along which printing elements locate slideably, side by side, with said depictions exposed, the printing apparatus being such that printing elements are set in the holder by placing printing elements on the aligning means, fitting the positioning portion over the printing elements and moving the permanently magnetised portion relative to the positioning portion to said first position in which printing elements are held magnetically against the positioning portion, printing elements being released from the holder back to the aligning means by locating the holder with attached printing elements on the aligning means and moving the permanently magnetised portion relative to the positioning portion to a second position in which the printing elements are not held magnetically against the positioning portion.
Claim 3
Dependent Claim
28 words
A printing apparatus as claimed in claim 1 wherein said positioning portion is held against the permanently magnetised portion by the magnetic attraction acting on the printing elements.
Claim 4
Dependent Claim
23 words
A printing apparatus as claimed in claim 1 wherein the positioning portion is flexible and hingedly moveable relative to said permanently magnetised portion.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |