Abstract: A silkscreen printing machine having a large printing table and a stencil related thereto stretched across said table, said machine being provided with means for moving a squeegee relative to said stencil and for pressing printing ink through the stencil into a material to be printed upon placed on said table. During a printing sequence, and at least during the first and latter stages of said sequence when the squeegee is pressed into abutment with the stencil and when the stencil, located parallel with the printing table is caused to sag by its own weight to an extent such that the stencil at other regions than the engagement point of the squeegee should abut the material or the printing table, the stencil is arranged to adopt an oblique position relative to the printing table such that the angle between said stencil and said table at said squeegee engagement point exceeds 0.degree., meaning that the stencil abuts solely the material at the said engagement point.

Abstract: A method and an apparatus for adjusting the position of a stencil relative to a printing table, characterized by(a) applying a transparent material to the printing table over a reference pattern,(b) transferring the stencil pattern onto the transparent material, e.g. by printing,(c) compensating for and eliminating any deviation between the printing pattern and the reference pattern by displacing the transparent material with the pattern printed thereon so that the pattern coincides with the reference pattern, and(d) adjusting the position of the stencil and a frame carrying the stencil in the same manner as the position of the transparent material was adjusted.

Abstract: A silkscreen printing machine, having a plurality of gripper arms, arranged to grip in a first position material to be printed upon and to move said material to a second position, the printing position, in which said material is printed upon. Each gripper arm is arranged to be registered at least in said second position. For registering the material in the first position of the gripper arm, the material is provided with first registering means. Second registering means are fixed relative to the frame of the printing machine. The first and second registering means are caused to co-act with each other, and said second registering means are adjustable in the direction of movement of the gripper arms.

Abstract: An apparatus for manufacturing or treating a stencil intended for use in a silkscreen printing machine. The stencil has been lighttreated to transfer a design to a pre-treated net or film. The film being subjected to a water-treatment process to rinse the film to develop said pattern. The apparatus comprises at least two pipes having mutually facing nozzles and being arranged to co-act with a displaceable holder in a manner such one of said at least two pipes passes on the rear of the film and the other of said at least two pipes passes on the other side of said film.

Abstract: An improved silk-screen printing machine is provided which includes a squeegee and means for urging the squeegee against an elastic stencil and the material to be printed. Means are also provided to impart movement to the stencil relative to the material to be printed upon during the printing process in order to compensate for any geometric printing error which would normally occur during the printing process.

Abstract: An apparatus for drying the ink on freshly printed material comprises a convey path arranged for movement in a horizontal plane. Spaced vertically above the horizontal plane of movement of said conveyor path is a plurality of hot-air nozzles, the exit orifices of which lie on a common plane and are directed onto said conveyor path. The conveyor path is supported for rectilinear movement on rollers carried by a frame structure and means are provided with which this frame structure can be raised and lowered so as to increase or decrease the distance between the said two planes. This affords the advantage whereby the apparatus is able to dry sheets of printed material of varying thickness with maximum efficiency.