US3842733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-colour printing machines using the silk-screen process
Assignee: Individual
•
Filing: 1973-05-21
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Granted: 1974-10-22
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Expires: 1993-05-21
Abstract
Abstract A machine for printing in two colours by the silk-screen process, on objects such as tubes, cases, small flasks of synthetic material and the like, comprising a conveyor carrying, at uniformly-spaced intervals, an odd number of rotatable mandrels each adapted to receive an object to be printed, a drive for effecting a forward step-by-step movement of the conveyor with a step which is an even multiple of the interval, and two printing stations disposed along the conveyor and spaced apart from each other by a distance which is an odd multiple of the interval, each printing station comprising a silk-screen movable in translation and a squeegee, the conveyor comprising a starplate rotatably mounted about a horizontal axis, the mandrels being also horizontal, and wherein the screens of the printing station are oblique with respect to each other.
Inventors
- 👤 L Dubuit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:22
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/08; B41F15/0872
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
144 words
A machine for printing in two colours by the silk-screen process on objects such as tubes, cases, small flasks of synthetic material and the like, comprising, conveying means carrying at uniformly-spaced intervals an odd number of rotatable mandrels each adapted to receive an object to be printed, driving means for effecting a forward step-by-step movement of said conveying means with a step which is an even multiple of said interval, and two printing stations disposed along said conveying means and spaced apart from each other by a distance which is an odd multiple of said interval, each printing station comprising a silk screen movable in translation and a squeegee, where said conveying means comprises a star-plate rotatably mounted about a horizontal axis, said mandrels extending horizontally from said star-plate, and wherein the screens of said printing station are oblique with respect to each other.
Claim 2
Dependent Claim
144 words
A machine for printing in two colours by the silk-screen process on objects such as tubes, cases, small flasks of synthetic material and the like, comprising, conveying means carrying at uniformly-spaced intervals an odd number of rotatable mandrels each adapted to receive an object to be printed, driving means for effecting a forward step-by-step movement of said conveying means with a step which is an even multiple of said interval, and two printing stations disposed along said conveying means and spaced apart from each other by a distance which is an odd multiple of said interval, each printing station comprising a silk screen movable in translation and a squeegee, where said conveying means comprises a star-plate rotatably mounted about a horizontal axis, said mandrels extending horizontally from said star-plate, and wherein the screens of said printing station are oblique with respect to each other.
Claim 3
Dependent Claim
23 words
A machine as claimed in claim 1, in which the screens of said printing station are both oblique with respect to the horizontal.
Claim 4
Dependent Claim
73 words
A machine as claimed in claim 1, in which each said screen is mounted fast with a toothed rack with which engages a driving pinion, said driving pinion being keyed for rotation on another pinion, said other pinion engaging with an operAting toothed rack for the two screens, said operating rack being movable longitudinally in translation, alternately in one direction and in the other, in synchronism with the driving means of said star-plate.
Claim 5
Dependent Claim
58 words
A machine as claimed in claim 1, in which each said mandrel is mounted freely rotatable on said star-plate, indexing means for determining for said mandrel a definite angular position with respect to said star-plate before printing, and rotational driving means for insuring the rotation of said indexed mandrel in synchronism with the translation movement of said screens.
Claim 6
Dependent Claim
56 words
A machine as claimed in claim 4, in which, for each printing station, the rotational driving means of said mandrels comprise a dog-clutch shaft driven in rotation in synchronism with the translation of said screen, said dog-clutch shaft being also movable axially in translation so as to co-operate with a dog-clutch tail on each said mandrel.
Claim 7
Dependent Claim
55 words
A machine as claimed in claim 5, in which for its rotational drive, each said dog-clutch shaft carries a pinion which engages with a toothed rack common to the dog-clutch shaft of each screen, said toothed-rack being rigidly fixed to a trolley mounted movably in translation in synchronism with the translation movement of said screens.
Claim 8
Dependent Claim
42 words
A machine as claimed in claim 6, in which the trolley carrying the toothed-rack which actuates said dog-clutch shafts is movably mounted on slides on which is also movably mounted a trolley carrying the toothed-rack effecting the translation movement of said screens.
Claim 9
Dependent Claim
34 words
A machine as claimed in claim 7, in which said slides form conjointly a horizontal plane, each of said trolleys being driven in translation movement by a crank-plate having a vertical axis of rotation.
Claim 10
Dependent Claim
46 words
A machine as claimed in claim 8, in which the two crank-plates are synchronous in rotation and ensure a movement in the same direction of the trolley effecting the translation movement of said screens and of the trolley effecting the rotational drive of said dog-clutch shafts.
Claim 11
Dependent Claim
126 words
A machine as claimed in claim 4, in which the indexing means for said mandrels comprise, for each mandrel, a locking pawl pivotally mounted on said star-plate and urged by a spring into application on one of its extremities against a notch of the corresponding mandrel, a curved ramp on the upstream side of the printing stations bearing against said mandrels over a part of the periphery of said star-plate, for rotation of said mandrels by friction to align said notch with said pawl, a releasing lever at each respective printing station pivotally mounted and adapted to act on the locking pawl of the mandrel located at the respective printing station to remove said pawl from said notch, for the liberation in rotation of said mandrel.
Claim 12
Dependent Claim
45 words
A machine as claimed in claim 10, in which said releasing levers are controlled for rocking movement in dependence on a cam driven in synchronism with the translation movement of the dog-clutch shafts for insuring the rotation of said mandrels after their liberation for rotation.
Claim 13
Dependent Claim
40 words
A machine as claimed in claim 10, in which said curved ramp ensuring the frictional drive of said mandrels is constituted by one of the sides of a belt passed in an endless loop over at least two fixed pulleys.
Claim 14
Dependent Claim
13 words
A machine as claimed in claim 12, in which said belt is fixed.
Claim 15
Dependent Claim
13 words
A machine as claimed in claim 12, in which said belt is movable.
Claim 16
Dependent Claim
82 words
A machine as claimed in claim 10, in which a fixed ramp runs over a part of the periphery of said star-plate, adjacent at least one of a treatment station before printing, and a drying station after printing; said ramp acting on the locking pawl of the mandrels which are located opposite to it for maintaining said pawl out of contact with the notch of said mandrels, and means to ensure rotation of said mandrels at at least one of said stations.
Claim 17
Dependent Claim
68 words
A machine as claimed in claim 15, in which for at least one of said treatment and drying stations, the means adapted to ensure rotation of thE mandrels at such station are constituted by one of the sides of a belt passed in an endless loop over at least two pulleys of which one is driven in rotation, said side bearing against at least one of said mandrels.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |