Patent FR852531A successfully refreshed from Google Patents.
Patent US1618962A successfully refreshed from Google Patents.
US4223602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stencil printer
Assignee: Individual
•
Filing: 1978-05-15
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Granted: 1980-09-23
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Expires: 1998-05-15
Abstract
Abstract A stencil printer has a vertical stack of frame-mounted stencils which are supported on one another. Laterally of the stack are arranged holding devices which engage the stencil which is second from the bottom so as to support the stack, while lifting devices are provided which lower the bottom stencil relative to the stack to a printing position and, subsequent to printing, raise it out of the printing position to an intermediate position in which it can be laterally withdrawn from the stack to be placed atop the same. The stack is then lowered by the height of one frame.
Inventors
- 👤 Mathias Mitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:30
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/34; B41F15/36; B41F15/08; B41F15/0831; B41F15/0845
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
In a stencil-printing apparatus, a combination comprising a plurality of stencils each including a stencil frame and a stencil screen mounted in the same; interengageable means on said frames for enabling the stencils to be vertically superposed to form an upright stack which is upwardly spaced from a printing plane, said interengageable means including on opposite lateral sides of said frames respective transversely projecting lugs having projections and depressions, said lugs each including two parts and means connecting said two parts for movement relative to one another in the general plane of the respective frame; first means for lowering the respectively lowermost stencil of said stack to said printing plane so as to be available for printing onto a workpiece; and second means for holding the remaining stencils of the stack upwardly spaced from the printing plane and from the lowered stencil.
Claim 2
Dependent Claim
142 words
In a stencil-printing apparatus, a combination comprising a plurality of stencils each including a stencil frame and a stencil screen mounted in the same; interengageable means on said frames for enabling the stencils to be vertically superposed to form an upright stack which is upwardly spaced from a printing plane, said interengageable means including on opposite lateral sides of said frames respective transversely projecting lugs having projections and depressions, said lugs each including two parts and means connecting said two parts for movement relative to one another in the general plane of the respective frame; first means for lowering the respectively lowermost stencil of said stack to said printing plane so as to be available for printing onto a workpiece; and second means for holding the remaining stencils of the stack upwardly spaced from the printing plane and from the lowered stencil.
Claim 3
Dependent Claim
54 words
A combination as defined in claim 1, said frames each having four corners and each of said lateral sides being provided with two of said lugs which are arranged in the regions of the respective corners, each lug at one lateral side being located opposite one of the lugs at the other lateral side.
Claim 4
Dependent Claim
34 words
A combination as defined in claim 1, said frames each having four corners and each of said sides being provided with one of said lugs which is elongated in direction intermediate the respective corners.
Claim 5
Dependent Claim
29 words
A combination as defined in claim 1, wherein said first means comprises two pairs of upright fluid-operated cylinder-and-piston units mounted below and at opposite lateral sides of said stack.
Claim 6
Dependent Claim
41 words
A combination as defined in claim 1, said cylinder-and-piston units each having an upwardly facing piston rod provided with a free end portion which is engageable in recesses provided at the lower side of the respectively lowermost stencil of said stack.
Claim 7
Dependent Claim
60 words
A combination as defined in claim 1, said frames having sidefaces provided with bores which are substantially horizontally oriented when said stencils are stacked; and wherein said second means comprises two pairs of substantially horizontally oriented fluid-operated cylinder-and-piston units each having a portion insertable into one of the bores of the respectively lowermost stencil so as to support the stack.
Claim 8
Dependent Claim
40 words
A combination as defined in claim 1, said second means comprises two pairs of fluid-operated cylinder-and-piston units mounted at opposite lateral sides of the stack and operable to engage and be retracted from the respectively lowermost stencil of the stack.
References Cited (Backward Citations)
US2599262A
Cited
US548056A
Cited
US707961A
Cited
US1986716A
Cited
US2218451A
Cited
US2206176A
Cited
US2470765A
Cited
US2730144A
Cited
FR1157711A
Cited
US2978125A
Cited
GB1249871A
Cited
SU495186A1
Cited
US3955681A
Cited
US4072090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |