Патент USA US2116877код для вставки
May 10, 1938. B_ F_ BROWN SQUEEGEE Filed June 1e, 1957 Y 2,116,877 Patented May 10, 1938 i2: 2,116,877 UNITED STATES PATENT >OFFICE 2,116,877 SQUEEGEE Benjamin F. Brown, Chicago, Ill. Application June 16, 1937, Serial No. 148,423 2 Claims. i The invention relates , to improvements in squeegees and in particular is directed to a squee gee adapted to be used intheso-called silk screen process for forcing the paint or other printing medium through the stencil. The object of the invention is to provide a squeegee in which the holder for the ñexible blade is unbreakablalight in weight, does not warp or twist and always maintains the flexible-blade in a 10 position to present a true straight edge'. Another object of the invention is to mount the iiexible blade of the squeegee in a holder com posed of separable parallel bars which‘are loose ly applied to the iiexible blade and clamped there 15 on by a separable handle or a plurality of handles. When the handle or handles are removed, the (C1. 15-245) bars 2’ and 3 respectively, and one or‘ more han dles 4. ‘ These clamp bars k2 and 3 are preferably made of sheet metal to make the device light in weight and are provid-ed with a cross sectional shape of 5 such a form to `prevent at all times any twisting or bending of the clamp bars. Each clamp bar is made of a relatively narrow sheet metal strip which` 'is ‘bent back and forth along spaced parallel lines extending lengthwise 10 of the strip to provide a‘ number of portions 5, 6 and l, each two adjacent portions being prefer ably positioned at a right angle to eachother. One' marginal portion 8 of the strip is bent more sharply to form an abutment for one edge of 15 parallel clamp bars are readily detachable from the flexible blade I. This marginal portion ter minates-in an outwardly and upwardly extending the marginal flange'g'. blade. V f ‘ It is also an object of -the invention to provide .20 a squeegee which can be' made of any desired length and may be provided with one or more handles adapted to be slidably adjusted length wise of the clamp bars applied to the llexible blade and clamped securely into the selected posi 25 tion or positions respectively. Still another object of the invention is to pro „ ' ‘ ¿ Both clampbars 2 and~3are made exactly alike and when applied to the flexible blade I, as shown in the' Figs. l and 2, form together a channel for receiving one marginal portion of the blade I and engaging the same at opposite sides along at least two spaced parallel lines which are spaced from the point where the edge of the blade I engages and abuts the portion 8 of the clamping bars 2 vide the squeegee with one or more detachable and 3, respective-ly. handles of such a construction that when the handles are mounted in position, they become ef The handle or handles 4 are not only used for facilitating the manipulation of the squeegee, as for forcing a printing medium through a stencil 30 30 fective to grippingly engage the separable bars which loosely engage the flexible blade to clamp the latter in position between said bars. The invention has as another of its objects to make the handles and clamping bars of relatively 35 thin sheet metal and to form these parts in such in a silk screen process, but also serves the pur pose of clamping the two parallel clamp bars 2 and 3 to the flexible blade I. Each handle 4 is preferably made of a wide sheet metal strip bent transversely into the shape 35 manner that the same may be manufactured easily and at a very low cost. simulating an inverted capital letter U. The free ends of the legs I3 of the U-shaped handle 4 are With these and other objects in view, the in provided with an inwardly projecting ñange 9 vention consists of certain novel features of con 40 struction, combination and arrangement of parts, as will be more fully described and pointed out in the claims. In the accompanying drawing: 1 is a perspective view of a squeegee con 45 struction embodying my invention, Fig. 2 is a cross-section of the same, taken through one of the handles and the lscrew-type clamping means, Fig. 3 is a perspective view of the detachable and adjustable handle of my squeegee, and Fig. 4 is a perspective view of a portion of the novel clamp bar employed in my invention. The squeegee of the present invention com prises the following principal parts: The ñexible 55 blade I, preferably made of rubber, two clamp adapted to enter into and engage the bottom of the groove formed between the two portions 6 4o and 'I of the clamping bars 2 and 3 respectively. The ilanges 9 are somewhat higher as the groove is deep. Any desired means may be provided for urging the legs I3 of the handle 4 into clamping engagement with the parallel clamp bars 2 and 3. 45 In the illustrated embodiment of the handle 4, the legs I3 are traversed by a pair of screw-type clamping means, each comprising a flat headed screw II engaging a companion sleeve nut I2 provided with a flat head I4 of the same size 5o as head I5 of the screw II. These clamping means II, I2 are preferably arranged outside the range of the clamping bars 2, 3 and are inserted in the holes I6 provided ln the legs I3 of the handle 4. Owing to this con- 55 2,116,877 struction of the handle 4 and the arrangement of the clamping means I I, I2, the handle may be secured at any desired position along the channel formed by the two clamp bars 2 and 3, without provided with four handles spaced from each other a suitable distance to permit two operators to seize the squeegee and operate it simultane ously. Although the invention has been disclosed and ' removing the clamping screws from the handle. The squeegee is assembled by first applying the described with reference to a particular embodi two clamp bars 2 and 3 loosely to one edge of the ment, it is of course obvious that various modi-~ ñexible blade I and then sliding the handles 4 ñcations may be made without departing from endwise upon the clamp bars, the ilanges 9 of the spirit and scope of the present invention. What I claim is: l. In a device of the character described, a pair between the portions 6 and 'I of each bar 2 and 3 respectively. The screw-type clamping means of separate parallel clamp bars, a flexible blade I I, I2 mounted previously on the handle 4 have to arranged between said clamp bars, each clamp be sufñciently loose to permit this application ofr bar Consisting of a sheet metal strip bent back and forth parallel to its longitudinal axis so as the handle. After the handle or handles 4 have been slidably moved into the desired position, the to produce an abutment for one edge of said blade, to produce ribs engaging the sides of said clamping means are tightened so that the free ends 9 of the legs I3 are urged toward each other ’ flexible blade-along spaced parallel lines and to and into clamping engagement with the clamp form a .groove on the outside of said bars, and 20 bars 2 and 3. The latter are urged hereby at a handle having means engaging said groove of the'same time in clamping engagement with the both Aclamp bars, said handle being adapted to hold said _clamp bars in clamping engagement; ñeXible blade I. ’ It will be noted that for the purpose of clean with said flexible blade. ing: the ñexible blade I, it may be completely 2; In a device ói the character described, a 25 detached from its metallic holder consisting of pair of separate parallel clamp bars, each bar having a longitudinal groove on its outer side and the clamp bars 2, 3 and the handle or handles 4. A flexible blade worn down to the point where it one of its longitudinal margins being bent an is no longer useful can be substituted quickly by gularly to form a shoulder, a ñexible blade ar 10 the handles entering the opposed grooves formed a new blade which, if desired, may have a differ ent thickness and width, and may also be of a -diiïerent material. It is believed obvious that the metallic holder is practically indestructible and of unlimited life. 'I‘hev squeegee of the present invention may be 35 made of any desired size and length and depend ing upon its length, one, two or more handles 4 may be' used for operating the squeegee and clamping the flexible blade between the clamp bars. A very long squeegee, for instance, may be 10 15 20 25 ranged between said clamp bars and engaging the shoulder formed thereon, a one-piece han dle >provided with means for frictionally engaging said groove in both clamp bars and adapted to be slidably adjustable lengthwise of the same, and'means onsaid handle adapted to cause said frictionally engaging means to clampingly en 35 gage -said clamp bars solely along the bottom of said groove, whereby the bars clampingly engage said flexible blade. ` BENJAMIN F. BROWN.