Abstract: The invention relates to a drying section which includes UV-light generating devices for drying a coloring substance applied to a material, for instance, colored print applied to print material and a silkscreen printer, and further comprising a conveyor for conveying the material passed one or more of the UV-light generating devices. The UV-light generating devices are cooled and a light and gas permeable grid is arranged between the material and each UV-light generating device. The grid has the form of three glass plates which define therebetween a plurality of apertures defined by recesses formed in the edge margins of respective glass plates.

Abstract: A method for use in multicolor silkscreen printing in which a plurality of printing stations are provided. A control unit is provided in which the position of the material is calculated in relation to a reference value, for example, the printing machine chassis. The position of the material is then determined along with a material feed position and a resultant measurement value is derived. The material is then moved to a second registration position in order to receive a further pattern thereon. After the second pattern has been applied, the print material is returned to the first registration position in order to reference the position of the pattern printed thereon at the second registration position. After a comparison of the first registration position and the second registration position, any established discrepancy between the actual position of the pattern during the transfer is then minimized with respect to subsequent printing operations.

Abstract: A method for correctly orienting print material in a silk screen printer includes determining the position of the print material relative to a reference position, storing that position, moving the print material to a printing position, printing a pattern on the print material, returning the print material to the previously determined position, and determining if a discrepancy exists between the desired position of the pattern and the actual position of the pattern on the print material. If a discrepancy exists between the desired and the actual position, one of a stencil frame, the print material, a printing table, and a first registered position is displaced for successive pieces of print material to minimize the discrepancy in successive actual pattern positions.

Abstract: A silkscreen printer (1) constructed for printing one and the same pattern by squeegee movement in two mutually opposite and mutually different directions. The silkscreen printer comprises a printing table (2) which is held stationary in relation to the printer chassis (3), a stencil (4) accommodated in a frame (5) above the printing table, and a squeegee arrangement (6, 6') which is arranged for reciprocal movement along the stencil, therewith to press ink through the stencil (4) and onto print material (7) placed on the printing table, such as to transfer the pattern of the stencil (4) onto the material (7). One side of the stencil frame (5) is provided with a first pivot device (8) which is intended for pivotal co-action with a first pivot pin (9) when printing is effected by squeegee movement in a direction towards the first pin (9).

Abstract: A device for securing and/or registering the stencil frame for a screen printing machine, said screen printing machine having amongst other things a printing table and a scraper and/or ink application device arranged above the printing table. Between the printing table and the scraper arrangement are arranged one or more guides (6, 7) intended to interact with the stencil frame (5). These guides are designed in such a way that the stencil frame (5) is able to be moved or displaced as a single unit from an initial position outside the screen printing machine to an appropriate position inside the screen printing machine, and vice versa. Inside the screen printing machine are present registering devices (8, 9) intended to guide the stencil frame into a registration position. The elements intended to interact with the stencil frame comprise at least two guides (6, 7) running parallel to each other, along which the stencil frame (5) is capable of being displaced.

Abstract: A silkscreen printing system for multicolor printing by the application of separate colors in a predetermined order is provided in which a plurality of printing tables are positioned in the path travelled by the print material through the printer arrangement. Each of the print tables cooperates with the respective stencil which is intended to transfer to the print material a single color of the multicolor print. The system also includes a material transporting arrangement for advancing print material to a first of the plurality of print tables so that a first color is applied to the material by the stencil located above the first table. Subsequently, a second printing table receives the print material by the transport of the material transporting means so as to apply a second color print to the print material. The material transporting arrangement extends along all of the plurality of printing tables in the arrangement and is non-electrically conductive.

Abstract: Printing forms are produced by arranging in a magazine a plurality of printing frames, each including a stretch cloth and a light-sensitive coating. The printing frames are arranged in parallel relationship and parallel to an outlet slit of the magazine. The frames are advanced within the magazine toward the outlet slit in a first direction. The printing frames are sequentially passed through the outlet slit in a second direction disposed substantially perpendicular to the first direction. The frames pass through the slit while remaining parallel to printing frames disposed in the magazine. Movement of each printing frame traveling in the second direction is terminated when the printing frame occupies a position in front of an imaging apparatus. The imaging apparatus is actuated to expose the light sensitive coating to an image corresponding to a desired printing pattern.

Abstract: A silkscreen printer which comprises a printing table which can be moved to a first position (printing position) to support material when a pattern is applied thereto with the aid of a stencil and squeegee. A further table is arranged for horizontal movement from a second position, located to one side of the printer, to a first position which is located in the printer and which corresponds to the printing position of the printing table when the printing table occupies its second position.

Abstract: A silk screen printer includes a cylindrical printing table for applying print to a sheet material and a stencil which is stretched in a frame. The stencil is adapted for reciprocating movement in response to reciprocating movement of the printing table and a squeege arrangement is included for urging the stencil towards the printing table to thereby transfer print onto sheet material located between the printing table and the stencil. A gripping device is provided for gripping the forward end of the material. The gripping device is movable with the frame in the direction of the longitudinal extent of the frame. A spring device urges the gripping device towards a movement-damping member whereby the gripping member is registered in relation to the chassis of the printer. The registration of the gripping device relative to the chassis is independent of the stop position of the frame and the printing table.

Abstract: The present invention relates to a silk-screen printing machine provided with a reciprocatingly movable squeegee arrangement adapted for printing in both directions of squeegee travel, when caused to move over a stencil placed over a material to receive print resting on a printing table. A frame incorporating the stencil is included in a frame assembly comprising an outer and an inner unit. The two units are joined together at one edge part of the printing table. Both of the units can be raised and lowered at one edge part of the printing table, while only one of the units can be raised and lowered at the other, opposing edge part of the printing table.

Abstract: A squeegee arrangement for use with silkscreen printers includes a squeegee and an arrangement for effecting relative movement between the squeegee and a stencil. The squeegee may be raised and lowered away from and onto the stencil. The squeegee and the raising and lowering arrangement are carried by a carrying device (6). The carrying device is rotatably supported at its end parts. An arrangement is also provided for varying the setting angles of the squeegee in relation to the stencil.

Abstract: The present invention refers to an arrangement for determining the thickness of a print applied to a print carrier.The applied print whose thickness is to be determined is orientated in a manner which enables the print to be irradiated with light, e.g. light beams, emitted from a light source; in that the light is projected onto the print at an angle not greater than 90.degree. in relation to a line orientated at right angles to the horizontal plane of the print; in that the respective magnitudes of a shadow image of the print thickness, produced by said light beams, and the extension of said shadow image along the carrier are evaluated together with information relating to the prevailing angle of the light beams; and in that the height or thickness of the print above the surface of the carrier is established on the basis of the thus evaluated magnitudes.

Abstract: The present invention relates to a squeegee arrangement for silkscreen printing machines, comprising two squeegees arranged side-by-side and made from a somewhat flexible material, and respective squeegee holders. The squeegees (5,5a) are arranged to move relative to a stencil (3) having a printing pattern provided thereon and located above a material substrate (4) to be printed upon. The squeegees are arranged to press print-forming substance (10) through the stencil (3) and onto the material substrate (4) during this relative movement. A plane extending centrally through respective squeegees forms an obtuse angle with the stencil and the material substrate in relation to the directional plane of squeegee movement. The centrally located planes of the two mutually adjacent squeegees (5,5a) subtend therebetween an angle of less than 120.degree., and greater than 60.degree.

Abstract: An arrangement for feeding a stencil frame having a stencil mounted therein to a silk screen printing machine and/or for discharging a stencil frame therefrom, in which the silk screen printing machine is provided with means for receiving a stencil frame and means for holding the stencil frame firmly in the printing machine. One or more stencil frame magazines are arranged between the printing machine a transfer and arrangement for feeding a stencil frame to the magazine and/or receiving a stencil frame therefrom.Each magazine is allocated horizontal planes for each of which there is provided means adapted to feed a stencil frame to the printing machine and/or adapted to remove a stencil frame from the printing machine.

Abstract: A sheet handling device for a printer, such as a silkscreen printed circuit card printer, includes a pick-up and hold device that translates between a register position on the printer and one or more stacks of cards. Adjustable limit switches on a transport track for the device determine the positions at which its movement is interrupted. Plural knobs on a controller for the device are each assigned to one of the operations of picking up or releasing a card, and is set to one of the positions of the limit switches. The controller senses the assigned operation and position setting of each knob in sequence, and carries out the card transport operations accordingly.

Abstract: A drier intended for drying printing ink applied to a material by a printing machine, incorporating a conveyor device consisting of a support for the material as it passes through the drier and at least two organs which emit ultra-violet radiation, UV radiation, for the purpose of drying and/or hardening the printing ink. These two organs which emit UV radiation are located at such a distance from each other that a material which has passed beneath the first organ, where it has been exposed on the one hand to UV radiation for the purpose of hardening the printing ink and on the other hand to the heat emitted by the organ which emits UV radiation, will be able to pass through a section which will cause the temperature of the material to fall before the material passes beneath the second organ.

Abstract: A drier (6) intended to dry print on a material (11), consisting of a conveyor device (6a) for moving the material in and out of the drier and a number of drying units (14,15,16). Each is arranged so as to be capable of drying that part of the print which is situated immediately against the unit. For the purpose of drying print (12,12a) applied to the material (11) only those units (14c,14d,16a,16b) are used which are arranged so as to be able to dry the applied print.

Abstract: A drying plant for drying printed material includes a material conveying means (3) and a plurality of print drying devices (4a, 4b). One or more first drying devices for drying print (6) are arranged on one printed side (5a) of the substrate material so as to face said side, while one or more second drying devices (4b) are arranged on an opposite side (5b) of said substrate material so as to face said opposite side; The second drying devices (4b) are arranged to act upon the printed part (6) of the substrate material in a drying and/or curing mode, before said part (6) is acted upon by the first drying devices (4a) in a similar mode.

Abstract: A drying arrangement located in a drying station and intended for drying printed material includes a material-conveying path (10), preferably arranged to convey the material through the print drying station, and further including one or more drying and/or curing means (19). The print drying and/or curing means (9) is, or are, arranged to operate intermittently. A control means (12) for controlling the intermittent operation of the means (9) is arranged to activate the drying and/or curing means over a period of time in which the wet coating in the material is located adjacent the drying and/or curing means (9).There is also included a multi-ink printing or multi-coating printing arrangement which comprises a plurality of sequentially arranged and interconnected printing machines (1, 2, 3) having intermediate drying arrangements (4 and 5).

Abstract: Method and arrangement for positioning a second pattern (10a) originating from a first pattern formed on a stencil in relation to a material (8) intended for the pattern. Said second pattern (10a) is formed by causing a coating intended for the material to pass through the first pattern, for example by means of a scraper blade in a silk screen printing machine. The position of the second pattern (10a) relative to a reference point, usually the frame components of the printing machine, is stored in an organ. Once a sheet of material to which the second pattern (10a) is to be transferred has been moved into the printing position, the position of the material or of a pattern which has already been applied to it is evaluated together with any discrepancy which would arise if the second pattern (10a) were to be applied to that material in that position.