Method and apparatus for applying a viscous or paste material onto a substrate
AssigneeDEK International GmbH
InventorDavid Godfrey Williams
Life of this patent
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Abstract
An application device for applying viscous or paste fluid material to a surface therebeneath and having a fluid outlet aperture in its lower region and including a sealing gasket or foil for sealing the outlet aperture against the surface. The gasket or foil is formed from a sheet of flexible material with an uninterrupted or continuous, non-apertured outer part extending around the periphery of the outlet aperture and surrounding an inner aperture or apertured inner region of the gasket or foil.
Claims31
An application device for use in a stencil printing machine, which includes a carriage for executing reciprocable strokes, to apply a fluid material to a surface of a stencil including a plurality of apertures and through the apertures onto a substrate disposed therebeneath, the device comprising:
- a main body slideably disposed along the surface of the stencil and including a main flow passage, and at least one outlet aperture in a lowermost surface thereof through which fluid material is in use delivered, the at least one outlet aperture being in fluid communication with the main flow passage and in use in sealing contact with the stencil;
- at least one fluid material reservoir in fluid communication with the main flow passage;
- and
- displacement means operable, during each stroke of the stencil printing machine, to displace an amount of fluid material from the at least one fluid material reservoir through the main flow passage which is greater than that delivered through the at least one outlet aperture.
An application device for use in a stencil printing machine to apply a fluid material through apertures in a stencil and onto a substrate disposed beneath the stencil, the device comprising:
- a main body slideably disposed in fluid-retaining relationship with an upper surface of the stencil, and including a main flow passage along which fluid material is displaceable, and at least one outlet aperture in a lowermost surface thereof through which fluid material is in use delivered to the substrate, the at least one outlet aperture being in fluid communication with the main flow passage and in use in sealing contact with the stencil;
- at least one fluid material reservoir in fluid communication with the main flow passage;
- and
- pressure-exerting means for exerting a pressure to the fluid material at at least one end of the main flow passage and thereby displace an amount of fluid material from the at least one fluid material reservoir through the main flow passage which is greater than that delivered through the at least one outlet aperture.
Dependencies are inferred from the claim text.