Patent US3675571A successfully refreshed from Google Patents.
US3675571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen printing machine for printing in multicolor a horizontally advanced web
Assignee: Stork Amsterdam NV
•
Filing: 1970-06-30
•
Granted: 1972-07-11
•
Expires: 1990-06-30
Abstract
Abstract A screen printing machine for multi-color printing on a web which is advanced horizontally on a supporting blanket includes parallel frame halves across which are mounted bridges. Each bridge has stencil holders for journaling the ends of cylindrical thin-walled screen stencils with there being one bridge for each stencil and the bridges extending parallel to the respective stencils. At least one end of a stencil is provided with a gear which meshes with a driving gear mounted in the frame half and protruding upwardly therefrom. The bridge is mounted on a frame half by means of a structure which permits adjustment of the bridge vertically longitudinally and transversely thereof so as to position accurately the stencil with respect to the advancing web.
Inventors
- 👤 Jacobus G Vertegaal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/34; B41F15/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
213 words
In a screen printing machine for multi-color printing on a web advanced horizontally on a support blanket, the combination of a machine frame having a pair of spaced parallel frame halves, a bridge mounted across said frame halves, stencil holder means on said bridge for supporting the ends of a thin-walled screen stencil so that the screen stencil is parallel to the bridge, a first gear in one of said frame halves drivingly engaging a second gear on one end of said stencil, means for mounting said bridge on said frame halves for longitudinal movement to adjust said stencil transversely of said web, means on one end of said bridge for moving said bridge perpendicularly with respect to the longitudinal direction of the bridge in a horizontal plane whereby the bridge is inclined with respect to the web, means connecting one end of said bridge and said first gear for moving said first gear in a vertical plane parallel to the direction of web advancement only in response to moving of said bridge one end in a horizontal plane and being non-responsive to movement of the bridge vertically and longitudinally, said gears having teeth thereon parallel to the rotary axes of the gears whereby said gear teeth are slidingly engageable with each other.
Claim 2
Dependent Claim
213 words
In a screen printing machine for multi-color printing on a web advanced horizontally on a support blanket, the combination of a machine frame having a pair of spaced parallel frame halves, a bridge mounted across said frame halves, stencil holder means on said bridge for supporting the ends of a thin-walled screen stencil so that the screen stencil is parallel to the bridge, a first gear in one of said frame halves drivingly engaging a second gear on one end of said stencil, means for mounting said bridge on said frame halves for longitudinal movement to adjust said stencil transversely of said web, means on one end of said bridge for moving said bridge perpendicularly with respect to the longitudinal direction of the bridge in a horizontal plane whereby the bridge is inclined with respect to the web, means connecting one end of said bridge and said first gear for moving said first gear in a vertical plane parallel to the direction of web advancement only in response to moving of said bridge one end in a horizontal plane and being non-responsive to movement of the bridge vertically and longitudinally, said gears having teeth thereon parallel to the rotary axes of the gears whereby said gear teeth are slidingly engageable with each other.
Claim 3
Dependent Claim
54 words
In a screen printing machine as claimed in claim 1 wherein said adjusting means comprises fork members on the ends of said bridge, and means on said machine frame comprising eccentric means engageable with said fork members for the vertical adjustment and a threaded spindle engageable with said fork members for the horizontal adjustment.
Claim 4
Dependent Claim
93 words
In a screen printing machine as claimed in claim 2 wherein said fork members comprise a first vertical fork member, said actuating means comprises an internally threaded sleeve horizontally positioned within sAid fork member, collar means on the end of said sleeve on both sides of said first fork member, a threaded spindle shaft rotatably and non-slideably mounted in a frame half engaging said sleeve, said spindle shaft extending longitudinally of said bridge whereby horizontal displacement of the sleeve resulting from rotation of the spindle shaft is transmitted to said first fork member.
Claim 5
Dependent Claim
88 words
In a screen printing machine as claimed in claim 2 wherein said fork members comprise a second vertical fork member at one end of said bridge, said actuating means comprising a shaft rotatably and non-slideably mounted in a frame half and having an eccentric thereon closely received within said second fork member, said shaft being longitudinally of said bridge whereby said eccentric is freely moveable vertically within said second fork member so that every horizontal component of movement of said eccentric is transmitted to said second fork member.
Claim 6
Dependent Claim
79 words
In a screen printing machine as claimed in claim 2 and comprising a horizontally positioned U-shaped member at each end of said bridge, a pair of shafts rotatably mounted in said frame halves transversely of said bridge and having eccentric portions thereon closely received within said U-shaped members respectively, said eccentric portions slideable freely in said U-shaped members longitudinally of said bridge whereby vertical components of the movement of the eccentric portions are transmitted to the respective U-shaped members.
Claim 7
Dependent Claim
47 words
In a screen printing machine as claimed in claim 5 wherein said U-shaped members are slideable along the respective eccentric portions in directions transverse to the web, said shafts being mounted in said frame halves for slideable movement in the longitudinal and transverse directions of the web.
Claim 8
Dependent Claim
120 words
In a screen printing machine as claimed in claim 5 and comprising a pair of brackets fixedly mounted on the bottoms thereof on the respective frame halves and supporting the ends of said bridge thereon, each bracket having a pair of vertical walls parallel to said bridge and an interconnecting end wall perpendicular to the bridge, there being horizontal slots in said vertical walls, said shafts being positioned in said slots respectively so as to be slideable in directions transverse to the bridge and web, and a threaded spindle shaft rotatably and non-slideably mounted in the end wall of one bracket and a shaft having an eccentric thereon rotatably and non-slideably mounted in the end wall of the other bracket.
Claim 9
Dependent Claim
107 words
In a screen printing machine as claimed in claim 1 wherein said gear moving means comprises a shaft mounted on said bridge parallel thereto, a rod having a fork on its upper end and receiving said shaft, a second shaft slideably mounted in one frame half for movement parallel to the direction of web advancement and perpendicular to said rod, the lower end of said rod fixedly secured to said second shaft, a bearing housing adjacent said first gear in a frame half and mounted on the driving shaft of the respective first gear, said slideable second shaft having a flattened portion connected to said bearing housing.
Claim 10
Dependent Claim
139 words
In a screen printing machine as claimed in claim 8 wherein each frame half has a first gear and said stencil has second gears on the ends thereof, the first gears in said frame halves protrude upwardly to engage the second gears on the stencil, a hood journaled on each bearing housing and pivotable in a vertical plane parallel to the first gear to expose the first gear to permit meshing thereof with a said second gear on a said stencil, a fork on each hood extending around the respective first gear, braking blocks on said fork engageable with the faces of the first gear, and a nose on said hood to define a handle for moving the hood, said hood closing over the first gear when the nose thereof is released and being moveable with the bearing housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |