Yieldable dyestuff applicator for screen printer
First Claim
1. In a device for treating selected portions of a substrate, in combination:
- an apertured screen overlying a substrate to be treated along a contact area, said screen and said substrate being movable in a predetermined direction;
a horizontal supply tube with an axis in a plane perpendicular to said predetermined direction, said tube being connected to a source of treatment liquid and spacedly disposed above said contact area; and
an applicator for said liquid including a guide structure secured to the underside of said tube and an elongate distributing member vertically movable within said guide structure in an axial plane of said tube, said distributing member forming an outlet for said liquid along a narrow zone of said contact area centered on said axial plane, said applicator forming a multiplicity of passages transverse to said axis connecting the interior of said tube with said outlet, said member resting on said screen in said contact area, said guide structure including conduit means communicating with said passages and with the interior of said tube.
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Accused Products
Abstract
A dyestuff applicator, located inside a cylindrical printing screen, comprises a horizontal ink tube which supports an axially extending ink-distributing member with freedom of relative mobility in a vertical axial plane of the tube. The distributing member, resting on the inner screen surface, forms a discharge slot communicating with the interior of the tube through a multiplicity of conduits closely spaced along the tube axis, the conduits being disconnectable from the slot with the aid of an axially slidable or rotatable shutter common to all the conduits and lodged in the distributing member. This distributing member is weighted down by the pressure of the ink in an overlying space, or by springs or fluid cushions inserted between that member and the tube.
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Citations
16 Claims
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1. In a device for treating selected portions of a substrate, in combination:
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an apertured screen overlying a substrate to be treated along a contact area, said screen and said substrate being movable in a predetermined direction; a horizontal supply tube with an axis in a plane perpendicular to said predetermined direction, said tube being connected to a source of treatment liquid and spacedly disposed above said contact area; and an applicator for said liquid including a guide structure secured to the underside of said tube and an elongate distributing member vertically movable within said guide structure in an axial plane of said tube, said distributing member forming an outlet for said liquid along a narrow zone of said contact area centered on said axial plane, said applicator forming a multiplicity of passages transverse to said axis connecting the interior of said tube with said outlet, said member resting on said screen in said contact area, said guide structure including conduit means communicating with said passages and with the interior of said tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a device for treating selected portions of a substrate, in combination:
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an apertured screen overlying a substrate to be treated along a contact area, said screen and said substrate being movable in a predetermined direction; a horizontal supply tube with an axis in a plane perpendicular to said predetermined direction, said tube being connected to a source of treatment liquid and spacedly disposed above said contact area; an applicator for said liquid including a guide structure secured to the underside of said tube and an elongate distributing member vertically movable within said guide structure in an axial plane of said tube, said distributing member forming an outlet for said liquid along a narrow zone of said contact area centered on said axial plane, said applicator forming a multiplicity of passages transverse to said axis connecting the interior of said tube with said outlet and terminating within said member in a common distributing channel paralleling said outlet and communicating therewith, said member resting on said screen in said contact area; and an elongate shutter element common to all said passages extending parallel to said axis in said member between said passages and said channel for selectively blocking the flow of said liquid. - View Dependent Claims (13)
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14. In a device for treating selected portions of a substrate, in combination:
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an apertured screen overlying a substrate to be treated along a contact area, said screen and said substrate being movable in a predetermined direction; a horizontal supply tube with an axis in a plane perpendicular to said predetermined direction, said tube being connected to a source of treatment liquid and spacedly disposed above said contact area, said tube being provided with lateral reinforcements; an applicator for said liquid including a guide structure secured to the underside of said tube and an elongate distributing member vertically movable within said guide structure in an axial plane of said tube, said distributing member forming an outlet for said liquid along a narrow zone of said contact area centered on said axial plane, said applicator forming a multiplicity of passages connecting the interior of said tube with said outlet, said member resting on said screen in said contact area; a fluid cushion inserted between said tube and said member for exerting a downward pressure upon the latter; and an articulated linkage interconnecting said tube and said member, said linkage being anchored to one of said reinforcements. - View Dependent Claims (15)
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16. In a device for treating selected portions of a substrate, in combination:
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an apertured screen overlying a substrate to be treated along a contact area, said screen and said substrate being movable in a predetermined direction; a horizontal supply tube with an axis in a plane perpendicular to said predetermined direction, said tube being connected to a source of treatment liquid and spacedly disposed above said contact area; an applicator for said liquid including a guide structure secured to the underside of said tube and an elongate distributing member vertically movable within said guide structure in an axial plane of said tube, said distributing member forming an outlet for said liquid along a narrow zone of said contact area centered on said axial plane, said applicator forming a multiplicity of passages connecting the interior of said tube with said outlet, said member resting on said screen in said contact area; a fluid cushion inserted between said tube and said member for exerting a downward pressure upon the latter; and an articulated parallelogrammatic linkage interconnecting said tube and said member.
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Specification