US1742339A - Screen holder - Google Patents

Description

Patented Jan. 7, 1930 y ERNST nonnneann, ois- GREAT NECK, naw Yonx PATENT ortica SCREEN HOLDER I Original applioationled Iulyl, 1927, Serial No. 205,429?. Divided and this application med" April'e,

1928. serial This application is a division of my prior application, Serial No." 205,429, filed July 13, 1927, andrelates to the stencil or printing screen and frame therefor, disclosed therein.

The general object of the invention is to provide a screen frame of simple, strong and durable construction in which the screen or stencil fabric may be easil and quickly mounted and properl stretc` ed in both directions and which a so provides a suitable reservoir for the'liquid color.

The characteristics and advantages of the invention are further sufficiently explained in connection with the following detail description ofthe accompanyingv drawings, which' illustrate one re resentative embodiment. After considering this example,

y skilled persons will understand that many .character described in the above identified variations may be made Without departing from thevprinciples disclosed, and I contemplate the employment of any structures that are properly within the scope of the appended claims.

Fig. `1 is a top plan of a screen frame and Vscreen emboding the invention in one form.

"Fig 2 is a fragmentary, sectional and perspective view, on enlarged scale.

Fig; -3 is a section at 3-3, Fig. 1.

The present frame and screen are desi ned for use inascreen printing machine o the parent application, but are .not necessarily limited to such uses, and may be employed for screen or stencil printing in machines of other types, or for stencilling by hand operations.

The screen proper consists of a sheet 1 of silk of suitable dimensions, the -margins of which are secured to the edges of a frame 2, so that the screen fabric overlies one main face of the frame and the inner contour of the frame forms a reservoir for the liquid color.

i The frame consists ofrectangular metal bars 5, 6, 7 and 38, of Whichbars and 6 are rigidl connected at one corner of the frame, bar is pivotall connectedto bars 5 and'8 and bar 8 is'pivota ly connected to bars 6 and 7. For thisj ur ose a dowel or pin 9 is fixed in a hole gril ed on an inner face of bar 6 near one end thereof, and the projecting end of this dowel has a bearing fit in a socket 10 formed in the adjacent end of bar 8. Bar 7 is pivotally secured to bar 5 in a similar way. A.

'Fastening strips 14 are provided, detachably secured to the outer faces of all the bars by screws l5.

The screen 1 is applied to the frame by first removing all of the fastening strips, and

securing two opposite margins of the fabric screen to the outer faces of the two opposite bars such as 5 and 8, by application of the corresponding fastening strips 14 and insertion of all of the screws except screws-15. When the fabric margin is secured to bar 8, the bar is tilted to angular position as shown in Fig. 3, and after securing the fabric the bar is tilted to plane alignment, thus powerfully stretching the screen in one direction, and is secured in that position' by insertion of an end screw 15 into the end of bar 6. The other opposite margins of the fabric are then secured to outer faces of bars 6 and 7 in asimilar manner while bar 7 is tilted, and that bar is then turned to plane alignment with the other bars, completing the stretching of the screen in both directions, and is secured in position by insertion of the remaining end screws 15b, whereupon the entire frame is firm and rigid and the fabric tightly stretched over one face thereof, ready for application of .a stencil design thereto as ful y explained in the above identified applica/tio paper strips care attached l esively around the inner margins of the frame overlapping 'the upper frame faces, their inner faces, and

the outer margins of the screen, as best shown in-'Fi 2, to prevent any leaka e of the liquid co or between the screen an the frame members.

Iciaiinft), l 1. A frame for screens -of the class described, comprising two bars rigidly lsecured at a right angleto each other, and two other bars each hin edly connected at one end to one of the rigidly connected bars, the other rovided .for the pivotal con.-A Jacent ends of bars 7 and 8,

Before' color is poured :u on the screen Y.

ends of said other bars being hingedly connected together, and means for securing a gunmen fahricto guter faul?1 oh the bars and rsecurmg' e arsin e 'guinent 2. A screen structurelsI for purposes described, comprising a frame consisting of four bars in rectangular arrangement, two

of the bars being rigidly` connected, and the other two bars being each hingedly connected at one end to an end of one of the rigidly connected bars, a hinge block to which the other ends of said other two bars are hingedly connected, fastening strips overlying outer edge faces of the bars, and 'a screen fabric overlying one face of the frame and having its margins secured between the fastening strips and the outer bar faces.

3. A screen structure for purposes described, comprising a frame consisting of four bars in rectangular arrangement, two of the bars being rigidl connected, and the other two bars be` eac ,hingedly connected at one end to an en of one of the rigidly connected bars, a hinge block to which the other ends of said other two bars are hingedly connected, fastening strips overlying outer edge faces of the bars, a screen fabrlc overlying one face of the frame and having its margins secured between the fastening strips and the outer bar faces, and strips of sheet material adhesively secured about inner walls of the frame and overlapping the outward margins of the screen ad acent the frame, to pre- Y vent leakage ofli ui color.

35 specification this In testimony w ereof l have signed this 20th da of February, 1928. ERNS BORREGARD.

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