Abstract: A system for forming artistic ink impressions. A case stores ink stamping accessories and/or allows large surface area stamps to be used.

Abstract: A screen printing machine including a stencil sheet assembly having a frame member having outer peripheral sides for partitioning an outer configuration and inner peripheral sides for partitioning an opening and stencil sheet adhered to one face of the frame member to cover the opening, a tension frame projected to inner sides of the inner peripheral sides of the frame member, having a raised portion raised toward the stencil sheet and arranged on other face of the frame member for applying tension to the stencil sheet, and holding means for holding the tension frame and the stencil sheet assembly which are put together such that a front face of the tension frame in a direction of raising the raised portion and the other face of the frame member are brought into contact with each other.

Abstract: A screen printing apparatus which is structured such that a printing agent is not left within a screen hole of a mask after printing, having a main body of the screen printing apparatus whose upper side within it is formed as a chamber which can be sealed by setting a mask supporting table as a boundary, and a pressure within the chamber can be ascended and descended at a desired timing by suitable pressure ascending and descending means such as air bags and the like.

Abstract: This invention is a retractable registration apparatus (10) mounted on a printing machine (12) for aligning a screen printing frame (28) with an image platform (14). The apparatus (10) has a pair of registration mechanisms, such as pins (64), for coupling with the screen printing frame (28) and a registration appendage (56) which carries the registration mechanism (64). The registration appendage (56) is rotatably mounted to the printing machine (12) for allowing rotation of the registration appendage (56) from a registration position to a retracted position. A locking mechanism, such as a detent (102), retains the appendage (56) with the registration mechanism (64) in the exact registration position.

Abstract: A support and tensioning frame for a stencil to enable solder paste to be applied to printed circuit boards and other electronic substrates includes a support frame engaged with at least two opposed mounting members. Each mounting member includes at least one projection for engaging an aperture in a stencil to mount the stencil under tension. A permanent-biasing mechanism engages one or more of the mounting members to place the stencil under tension. A second biasing mechanism engages the mounting member to provide a bias opposite that of the permanent-biasing mechanism to facilitate release of a mounted stencil.

Abstract: In a screen printing apparatus for printing a conical object rotatable about a rotation axis (4) by means of a screen member (2) which must perform a circular motion about the cone intersection point (6) of the conical object, this circular motion is reproduced by means of three linear drive devices (14,22) and 24). A first linear drive device (14) produces a translational motion of a U-shaped frame (10), in which the screen member holder (8) is held, in a direction transverse to the rotation axis (4) of the object to be printed. The additional drive devices (22,24) act to superimpose both a translational motion transverse to that of the first linear drive device (14) and a rotary motion of the screen member (2) about its center point (38). The first linear drive (14) and the additional linear drive devices (22,24) are numerically controllable by a computer, in which a predetermined motion course for the screen member is stored.

Abstract: Methods and apparatus for adjusting the position of a printing screen having a center of rotation mounted on a screen frame for use in screen printing processes are disclosed. The apparatus includes a screen frame with a printing screen mounted thereon, a screen frame holder, a plurality of first arcuate guides mounted on the screen frame defining an arc with a predetermined circumference defined by a predetermined radius, a plurality of guide rollers mounted on the screen frame holder and corresponding to the plurality of first arcuate guides whereby the plurality of guide rollers movably supports the plurality of first arcuate guides and an adjustment mechanism adapted to urge the screen frame around the center of rotation of the printing screen.

Abstract: In one aspect, the present invention is an apparatus for microregistering a screen within a screen printing device, wherein the screen printing device has at least one pallet and a pallet drive mechanism for indexing the pallet. The apparatus includes a semi-stationary print head assembly which is selectively movable in an x-direction which is parallel to the path of the pallet and selectively lockable at a desired print location, the print head assembly including: a mechanism for registering the screen in a generally horizontal x-y plane, wherein angular displacement of the screen in a theta direction corresponds to rotation about a substantially vertical axis passing through the x-y plane; and, a mechanism for adjusting the orientation of the screen within the x-y plane with either a linear displacement in the y-direction or an angular displacement in the theta-direction, or both.

Abstract: A method for creating large area, thick film resistors with improved predictability and uniformity. “Tent poles” are employed during the printing of the large area resistors to prop up the screen mesh to ensure the resultant resistor does not have a scooped out center portion. The tent poles can be made from gold pads, resistor spots or emulsion spots.