Other

General Research Corporation

James A Black

Harry Russell Farwell

Frank L Porth

Gregory J Munson

James O Rop

A stencil exposure apparatus that includes a frame with central translucent stencil mounting surface. A plurality of generally flat, resilient, compressible seal elements extend between opposite sides of the translucent surface and are movably mounted on the frame to accommodate the stencil exposure apparatus to a variety of stencil dimensions. A stencil chase mounting bar is movably mounted on the forward face of the frame, is connected to a support bar on the rear face of the frame, and which includes a mechanism for maintaining the orientation of the bar relative to the frame while the mounting bar is being moved. Mounting blocks are slidably mounted on the mounting bar and include a clamping mechanism for rapid lateral adjustment of the blocks.

Stencil screen exposure apparatus

A stencil exposure apparatus that includes a frame with central translucent stencil mounting surface. A plurality of generally flat, resilient, compressible seal elements extend between opposite sides of the translucent surface and are movably mounted on the frame in order to accommodate the stencil exposure apparatus to a variety of stencil dimensions. A stencil mounting bar is movably mounted on the frame and includes means for maintaining the orientation of the bar relative to the frame while the mounting bar is being moved.

Stencil exposure apparatus having a flexible compressible peripheral seal element suspended by a plurality of radiating tension straps in a selected configuration between a translucent stencil pattern support surface on one side, and a stencil fabric layer retained in a stencil frame or chase on the other side, there being a suction connection for the space enclosed by said seal, said translucent surface, and said stencil fabric. In one apparatus embodiment disclosed, the peripheral seal is a traveling seal suspended on a stencil frame carriage which is selectively shiftable relative to the translucent surface and supports the stencil chase. In another apparatus embodiment disclosed, the tension straps are shiftable to vary the dimensions of the area enclosed by the peripheral seal.

Stencil exposure seal combination

Stencilling apparatus having a print and flow action relative to a combination squeegee and flow coater assembly, wherein excess stencilling fluid ahead of the squeegee can flow through the assembly, by flow over the squeegee into a control reservoir behind the squeegee and ahead of the trailing flow coater, and a controlled layer of the fluid flows from the reservoir beneath the lower edge of the flow coater onto the underlying stencil screen.

Stencilling apparatus with flow through print and flow action

In a stencil screen printing system, submersion transfer apparatus for forcing fluid through the pattern screen, including an elongated member with downwardly depending end supports having therebetween a strand submersed in the coating fluid e.g. printing ink. The elongated member is fitted in place of the conventional squeegee on a stencil screen press, so that the submerged strand is positioned in contact with the upper surface of the stencil screen during the print stroke to force fluid such as ink through the pattern of the mesh screen.

Stencil screen coating apparatus

A stencilling printer with a flow coater specially mounted to sense viscosity of stencil fluid flowing from a reservoir between the flow coater and the squeegee, the flow coater being shiftable and operably associated with a supply of viscosity-altering liquid for controllably altering the viscosity of stencil fluid in the reservoir.

Flood coater and squeegee with viscosity sensing and control

A stencil screen printing press especially suitable for web stock, employing a stencil frame that rocks back and forth over a curved bed in a controlled relation to retractable web register means and to web directional control and advancing means.

Rocker press with squeegee and web feed means

Stencilling apparatus for applying successive coatings to traveling web stock. The web stock may be advanced in successive wraparound turns to the same stencilling station. The adjacent turns are stencilled simultaneously at this station by a multipart squeegee in a multipart stencil frame, after each is placed in registry. The web tension in each turn of web stock is independently controlled by a pressure differential controller that retains a variable length loop of web under tension by a dynamic air flow pressure differential, which also causes a drying action of any coating on the web.

Web printer

Slit registry apparatus and method for registry of flexible, generally planar stock as for stencilling thereon, involving formation of periodic transverse slits and adjacent edges in the stock, at least one of the edges and the adjacent stock zone or area being offset from the plane of the stock for engagement of this offset edge by a registration surface.

Web slit registry

Web stencilling and drying apparatus for web stock with at least one intermittent feed stencilling station and slit registry means for stock therefor, a continuous feed ultraviolet drying station, and first and second dynamic flow pressure differential web controllers upstream and downstream of the ultraviolet drying station, the first one including sensors responsive to the length of the web loop therein to control web intermittently fed thereto and continuously fed therefrom.

Web stencilling and drying apparatus

A screen printing press employs a screen carriage securing a printing screen frame and screen therein and which reciprocates through print and return strokes over a reciprocally rotating print cylinder. Printing stock is advanced between the print cylinder and the screen during printing strokes. The screen carriage includes a disengageable drive which permits feeding print stock through the machine without effecting printing thereon. The screen carriage further includes adjustable screen frame holding means to which the screen frame is slidably mounted permitting partial or total removal of the screen frame from the screen carriage. A fully adjustable squeegee means and flow coater assembly is positioned above the screen and is provided for elevating and longitudinally shifting the flow coater and squeegee assembly away from the printing area for inspection and maintenance of the press. The screen carriage includes cam means for positively engaging squeegee support means for controllably lowering the squeegee to the screen during each printing stroke. Externally adjustable side registration means are provided to permit adjustment of the print stock registration during operation of the press.

Growing community of inventors

Kent City, MI, United States of America

James A Black