An apparatus for securing a printing screen frame is configured so that, when a piston rod moves backward due to the supply of air pressure, tensile force applied to a support frame of a printing screen unit by a coupling protrusion of a tension member is released and the printing screen unit can be replaced, and, when the piston rod moves forward as an elastic spring extends due to the stop of the supply of the air pressure, the coupling protrusion of the tension member is caught on the support frame of the printing screen unit and applies pressure thereto due to elastic force so as to tension the printing screen, and then reverse pressure can be applied thereto by using air pressure, as needed.
A print screen unit, characterized in the present invention, comprises: a printing screen in which engaging holes are formed at regular intervals along the longitudinal direction on the edge and a printing hole pattern is formed in the center; first and second pairs of interface parts fitted and coupled through a connecting member so as to face each pair of edge portions of the printing screen; and first to fourth corner pieces connecting each of the interface parts, wherein the connecting member consists of: a body which mounted horizontally on a seating part formed on the lower surface of the interface part; one or more first engagement protrusions which are inserted into and engaged with a first connection slot (44) formed in the seating part while projecting vertically at regular intervals along the longitudinal direction of the body at the center with respect to the upper surface of the body so as to be individually inserted into the engaging holes of the edge portion of the printing screen; and one or more second engaging projections which vertically project at regular intervals along the longitudinal direction of the body at the outer end with respect to the upper surface of the body and are inserted into and engaged with a second connection slot formed in the seating part.
The apparatus for securing a printing screen frame according to the present invention is structured so that, when a piston rod moves backward due to a supply of air pressure, the tension between a coupling protrusion of a tension member and a support frame of a printing screen unit is released and the printing screen unit can be replaced, and, when the piston rod moves forward as an elastic spring expands due to a stop in air pressure, the coupling protrusion of the tension member is caught on the support frame of the printing screen unit and applies pressure due to an elastic force so as to place the printing screen under tension, and then reverse pressure can be applied using air pressure, as needed. Thus, the apparatus can be used semi-permanently without being deformed or damaged due to a foreign substance or friction, and, at the same time, an insufficient tension can be readjusted according to the change in the tensile value of the printing screen which stretches after a long period of use.
A printing screen frame holding device is provided. The printing screen frame holding device has a tensioning operation portion and an elevating operation portion, which are operated successively at an interval of few seconds by means of control of a rate of supply of air pressure by an orifice, are mounted on a quadrangular frame-shaped frame holding means that includes a combination of multiple mounting frames and multiple corner pieces, without provision of any separate mechanism or an additional component.
B41C 1/14 - Forme preparation for stencil printing or silk-screen printing
H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
Disclosed herein is a print screen unit. The print screen unit has a structure in which the connection member is positioned to be slanted at a predetermined angle when the print screen is fitted to an interface unit, such that, as tensile force is applied to the print screen, the engagement state of engaging apertures of the print screen and engaging protrusions of the connection member moves toward the coupling direction thereof so as to further increase coupling force therebetween. And the print screen unit has a structure in which, when each of corner pieces is fitted into and connected to each of end portions of the interface unit, a connection surface area increases so as to bring three surfaces of the inside of the interface unit into close contact with a first and a second piece member.
H05K 3/12 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using printing techniques to apply the conductive material
A storage box for print screen units of the present invention has a structure of comprising: a main frame (10) having glass doors (11) provided at the front opening thereof; slot shelves (20) having a plurality of slot parts (21) such that every print screen unit (1) is respectively erected thereon and stored and released; a plurality of slot display lamps (40) sensing and displaying whether the print screen units (1) are stored or released and whether the same are abnormally stored, while being individually lit in each of the plurality of slot parts (21); and a storing and releasing terminal (60) for controlling whether the print screen units (1) are stored and released. Therefore, when the print screen units (1) of different sizes are erected and inserted regardless of order, the print screen units (1) can be aligned and stored in a single file while the front parts thereof are matched without touching each other, and damage caused by collision and life reduction can be prevented and, simultaneously, the print screen units (1) can be protected from dust and static electricity. In addition, by means of the storing and releasing terminal (60), storing and releasing and abnormal storing can be visually and more quickly confirmed according to various color changes of the slot display lamps (40) individually provided in every slot part (21), while the print screen units (1) have a specified position so as to be respectively stored in and released from the plurality of slot parts (21) of the storage box.
G08B 5/22 - Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmissionVisible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission
A printing screen frame holding device according to the present invention is structured such that a tensioning operation portion and an elevating operation portion, which operate successively at an interval of a few seconds by means of adjustment of the rate of supply of air pressure by an orifice, are all installed on a quadrangular frame body-shaped frame holding means that comprises a combination of multiple mounting frames and corner pieces, without any separate mechanism or an additional component. Therefore, the printing screen frame holding device according to the present invention has the following advantages: the inner peripheral area of the mounting frames is not reduced by the width of an auxiliary support table as in the case of the prior art, making it possible to maximize the printing area of the printing screen, and making it unnecessary to replace the frame holding means; there is no need to separately install an additional assembly comprising an auxiliary support table, an elevating cylinder, a speed valve, a feeding, a solenoid, a tube, and the like in order to separately operate the elevating operation portion as in the case of the prior art; and operations can be simplified when the printing screen unit is attached/detached (replaced) such that erroneous operations are minimized, mounting is facilitated by reducing the volume and weight, and the manufacturing cost can be lowered.
H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
B41C 1/14 - Forme preparation for stencil printing or silk-screen printing
A print screen unit of the present invention: can minimize the loss of materials and, simultaneously, reduces costs and time so as to lower production costs since an upper side long body and an a lower side engaging protrusion of a connection member are cut at the same time by pressing and can be continuously mass-produced; has a structure in which the connection member is positioned to be slanted at a predetermined angle when an edge engaging aperture of a print screen is caught on the engaging protrusion of the connection member and fitted to an interface unit, such that, as tensile force is applied, the engagement state of the edge engaging aperture of the print screen and the engaging protrusion of the connection member moves toward the coupling direction thereof so as to further increase coupling force; and has a structure in which, when the end portion of the interface unit and a corner piece are connected by press-fitting, a connection surface area is increased so as to bring three surfaces of the structure into contact with each other, thereby enabling a gap between the end portion of the interface unit and the corner piece to be minimized and, simultaneously, enabling the same to be firmly coupled such that horizontal and vertical shaking is prevented.
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