US2264501A - Paste applying mechanism - Google Patents

Description

Dec. 2, 194 1. BEACH 2,264,501

PASTE APPL YING MECHANISM Original Filed April 30, 1938 J INVENTOR Auriga/v AAA/w 540 Patented Dec. 2, 1941 v .UNITEDFVSTATES PATENT OFFICE Almeron Allan Beach, Hobart, N. 36..

Original application April 30, 1938, Serial No. 205,143. Divided and this application January 22, 1940, Serial No. 314,913 r 7 3 Claims.

I This invention relates to paste applying machines, such, for example, as those designed for use by wall paper hangers in applying paste to wall paper, and it has for its general object improvements in the paste applying and distributing means; r

In my copending application, Serial No. 205,143, filed April 30, 1938, Patent No. 2,191,225, granted February 20, 1 940, I have described and claimed a paste applying machine, especially adapted for use in applying paste to Wall paper, which is so designed and constructed that the paper can readily be placed in position in the machine for the application of the paste to successive strips thereof of any desired length drawn directly from the roll.

The present application, which is a division of my copending application above identified, is directed to the provision, in paste applying machines, of paste distributing and gauging means which is so designed and constructed that it will facilitate the quick, even and uniform application of paste of the amount and thickness required for the particular grade and weight of paper being hung.

An important feature of the invention is the provision of mechanism for insuring uniform distribution and at the same time determining the thickness of the layer or ridges of paste to be left upon the paper, which mechanism can readily be adjusted to vary the layer or ridge thickness to meet the conditions presented in the case of wall paper, for example, by the character and weight of the particular paper that is to be hung.

Another important feature of the invention is the provision of a ridge-forming or grooving device, which efiects a preliminary treatment of the paste after it has been applied by the paste applying roll to cause it to be formed in ridges, in combination with a scraper or doctor which can be brought into such different relations to the path of travel of the paper, as-it leaves the ridge-forming device, that the height of the ridge can be varied by cutting off more or less of the top thereof, thus varying the ultimate thickness of the layer or ridges of paste left upon the paper as it is pulled from the machine in which the paste distributing and gauging mechanism is incorporated.

Other objects and important features of the invention will appear from the following description and claims,-when considered in connection with the accompanying drawing, in which paper paste applying machine having the invention embodied therein;

Figure 2 is a front elevation, with parts broken away, of the paste-grooving or ridgeforming device and the associated scraper or doctor of the illustrative embodiment of the invention;

Figure 3 is a section on the line 3-3 of Figure 2 showing the method of adjusting the ridgeforming device and the associated scraper or doctor to produce the desired thicknessof paste on the'paper, the adjustment shown in Figure 3 being for a comparatively thin layer of paste; and

Figure '4 is a section similar to Figure 3 showing'the parts adjusted to provide a thicker coating of paste.

In the illustrative embodiment of the invention, a sheet metal casing or container 2 of a length sufficient to handle the ordinary widths of wall paper has a' bottom provided with a Well portion 4, preferably of a curvature-concentric with the curvature of the paste-applying roll 6, andis also provided with two inclined portions 8 and I0 sloping toward the well portion 4, the end l2 of the casing preferably extending below the bottom of the casing to provide for level support of the casing when placed on a level surface, the two ends of the casing, of which only one is shown, being preferably connected by leg portions [6 and I8 also formed of sheet metal bent into the shapes shown.

A part of the cover for the casing is formed integral therewith as shown at 20 so as to provide a container for the paste when the casing is tipped up edgewise to be carried from one job to the other, a handle 22 being provided for carrying the casing in this position. v

A movable cover 26 is hinged at one end 38 to the end [2 of the casing 2. The cover 26 is shapedto clear the roll 6, being curved in this part so that it is substantially concentric with the roll 6. Near its front the cover top is spaced sufiiciently from the top edge of the casing 2 to pro-' vide for guide rolls 34 and 36 which have trun-'-' nions at their ends extending through the end walls of the cover, as shown particularly in Figure 1.

The rear edge of the top portion of the cover is curved upwardly at 42 to provide a rounded bearing for the wall paper 44 coming from the roll 46. The rounded bearing 42 holds the wall paper down as it enters the space between the roll 6 and the cover 26 so that the paper will Figure 1 i t n r ti through walltravel a considerable distance in contact with the roll 6, the paper being held down on the other side of the roll by the guide roll 34.

The guide rolls 34 and 36 are spaced sulficiently to permit the projection therebetween of the paste-distributing and gauging means, comprising the ridge-forming or paste-grooving device 48 and its associated doctor or scraper 50 carried by the casing 2.. The ridge-forming part of the paste-distributing and gauging means, as herein shown, comprises a strip of metal bent into U shape in cross section to form a bar extending across the casing 2 with the curved part of the U extending slightly above, a plane tan.- gent to the lower sides of the guide rolls 34 and 36. Slots 52 are cut through the curved bottom of the U of the ridge-forming, or grooving bar so that the paper-engaging side thereof presents a series of alternating slots and rounded teeth 54 which act after the manner of a comb to form alternating ridges and grooves in the paste 56 on the under side of the wall paper as the paper is drawn over the grooving or ridge-forming bar 48 after it has traveled over the paste-applying roll 6, thereby simulating to someextent the effect produced when paste is applied by a brush in the usual manner. The open or hollow construction of the comb bar 48 prevents clogging withv paste and contributes. to more. uniform distribution of the paste.

The slots 52 in the toothed bar 48 are preferably sufficiently deep so that the bar 48 simply forms ridges in the paste regardless of its thickness. In order, however, to insure a uniform thickness of the paste on the under side of the paper and also to reduce the thickness if too much paste has been applied by the roll, a doctor or scraper 50 is provided, which has its upper edge spaced somewhat from the toothed bar 48 so as to provide for the convenient discharge back into the casing 2 and well 4 of any excess paste removed thereby.

Both the ridge forming bar 48 and the doctor 50 are connected at their ends to supports 58 and 60 mounted on trunnions 62 and 64 extending through the end walls l2 and I4 of the casing, the illustrated trunnions comprising machine screws screwed into. the rectangular members 58 and 60. The rectangular member 60 has an extension to the rear of the ridge forming bar 48. On this extension is mounted a stud 66 extending through a curved slot 68 concentric with the trunnion 64 to provide for the rocking of the ridge forming bar 48 and the doctor 50 about the axis of the trunnions B2 and 64 to bring the ridge former and doctor into different relations to the paper passing thereover or, in other words, as shown in Figures 3 and 4, so to tilt them with respect to the path of travel of the paper, as it passes between the guide rolls 34 and 36, that the doctor or scraper 50 will be spaced more or less from the under side of the paper in order to leave a greater or less thickness of paste upon the paper. The ridge former and associated doctor may be secured in their different adjusted relations to the paper passing thereover by a wing nut Ill screwed upon the end of the stud 66.

From the foregoing description the operation of the device will readily be understood. A portion of the paper is unwound from the roll 46, drawn over the top of the roll 6 and over the top of the toothed bar or ridge former 48 and the doctor 50 and a sufiicient distance beyond the front edge of the casing 2 to allow it to be gripped by the paper hanger, and then the cover 26 is brought down into its closed position which causes the rounded part 42 of the cover to press down on the paper behind the roll and causes the guide rolls 34 and 36 to engage the paper on each side of the ridge former 48 and doctor 50 and bring the paper down into engagement with these two members.

The paper being now in position to have the paste applied thereto, the paper hanger simply grips the portion thereof projecting beyond the front edge of the casing in Fig. 1 and draws through the machine the desired length to be applied and then cuts it off, this movement efiecting a rotation of the roll 6 which applies paste to the under side of the paper, which paste is then grooved and ridged by the ridge former 48 and is then engaged by the doctor 50 to reduce it to the desired thickness and amount for the particular grade of paper being hung.

What is claimed as new is:

1. Paste distributing means for a paste applying machine comprising a paper spanning bar of U-shaped cross-section adapted to engage the paper after the paste has been applied thereto, said bar being provided in the rounded paperengaging side thereof with a series of teeth having relatively deep slots therebetween for forming a series of ridges and grooves in the paste.

2. Paste: distributing and gauging means for a paste applying machine comprising a paper-spanning bar of U-shaped cross-section adapted to engage the paper after the paste has been applied thereto, said bar being provided in the rounded paper-engaging side thereof with a series of teeth having relative deep slots therebetween for forming a series of ridges and grooves in the paste, and a doctor so located with respect to said distributing means as to trim said ridges to a predetermined uniform height.

3.. Paste distributing and gauging means for a paste applying machine comprising a paperspa-nning bar of U-shaped cross-section adapted to engage the paper after the paste has been applied. thereto, said bar being provided in the rounded paper-engaging side thereof with a series of teeth having relatively deep slots therebetween for forming a, series of ridges and grooves in the paste, and a doctor so located with respect to said distributing means as to trim. said ridges to a predetermined uniiorm height, said doctor having adjustable supports whereby it may beso adjusted with respect to the path of travel of the paper as it leaves the bar that the height of the trimmed ridges may be varied.

ALLiERON ALLAN BEACH,

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