USRE23542E - Sheetsxsheet i - Google Patents

Description

Sept. 2, 1952 w. A. BIHARY lie-23,542

, APPARATUS FOR PREPARING MASKING APRONS ori inal Filed Dec. 10, 1948 2 SHEETS-SHEET 1 Inventor Willi am A. Biliary Attorney:

W. A. BIHARY APPARATUS FOR PREPARING MASKING APRONS Jriginal Filed Dec. 10, 1948 Fig. 2.

Inventor William A. Binary Yw%%%z@ Attorneys Reissue'd Sept. 2, 1952 UNITED STATES PATENT ossics APPARATUS FOR PREPARING MASKING APRONS William A. Bihary, Miami, Fla, assignor to Minnesota Mining & Manufacturing Company, St. Paul, Minn., a corporation of Delaware Original No. 2,522,773, dated September 19, 1950, a Serial No. 84,482, December 10, 1948. Application for reissue June 10, 1952, Serial No. 292,777

Matter enclosed in heavy brackets I: II appears in the original patent but forms no part of this reiluo specification: matter printed in italics indicates the additions made by reissue.

4 Claims.

t This invention relates to apparatus for preparing masking aprons such as are used in the finishing of automobiles and other articles where it is desirable to use an apron for masking out portions of the surface, particularly when a spray gun is used for applying lacquer and the like to the surface to be finished.

The primary object of this invention is automatically to connect a stripof adhesive tape with the masking apron as the latter is drawn off of a supply roll of masking paper.

Apparatus of the type to which this invention relates is exemplified in United States Patents Nos. 1,963,666; 2,012,014; and 2,374,103.

Another object of the present invention is to simplify the construction of tape-applying apparatus and to prevent the tape from adhering to portions of the supply roll of paper other than that from which the apron is being formed.

Still another object is to utilize the force of gravity in pressing the adhesive tape against the. masking paper, and further to regulate the distance which the adhesive tape overhangs the edge of the masking paper.

The above and other objects may be attained by employing this invention which embodies among its features a carriage mounted for vertical movement adjacent one end of a supply roll of masking paper, means on said carriage to support a roll of adhesive tape in overhanging relation to the supply rollot masking paper. and a pressure roll carried by the carriage below the roll of adhesive tape beneath which tape fromthe roll of adhesive tape is directed and pressed against the roll of masking paper by the weight of the carriage. and the mechanism carried thereby.

Other features include means adjacent the end of the supply roll of masking paper remote from the carriage'for engaging said roll of paper and advancing it toward the pressure roll, and means engaging the end of the supply roll of masking paper beneath the pressure roll yieldingly to hold said supply roll against the adjustable means.

Still other features include an annular peripheral flange on the pressure roller adjacent the end thereof which overhangs the supply roll by which the adhesive tape is pressed into contact with the paper on the supply roll in spaced relation to the edge thereof.

In the drawings:

Figure 1 is a'perspective view of an apparatus for preparing masking aprons, embodying the features of this invention.

12 mm 2 is a longitudinal sectional view taken substantially along the line 2-2 of Figure 1.

Figure 3 is a transverse sectional view taken substantially along the line 3-3 of Figure 2,

Figure 4 is a perspective view of one of the supporting standards for the roll of masking pap r showing the carriage mounted thereon, and

Figure 5 is a perspective view of the guide plate for the supply roll of masking paper.

Referring to the drawings in detail, a base It] is equipped with a U-shaped frame l2 having upstanding legs I4 and I8 which are pierced intermediate their ends by aligning openings I8 and 20, respectively. It is to be noted that the opening I8 is o1 greater diameter than the opening 20 for a purpose to be more fully hereinafter described. I

Formed in the leg Iii above the opening 20 is an internally screw-threaded opening 22 for the reception of the threaded end of a thumb screw 24 which passes through the leg is and bearsagainst a guide plate 26 which is riveted or otherwise secured as at 28 to the leg IS on the inner side thereof below the opening 20. As illustrated in Figure 5, the guide plate as is bifurcated adjacent its lower end, as at 30, and is provided with oilset portions 32 which serve to hold the plate 26 in spaced relation to the leg [8, as will be readily understood upon reference to Figure 2. Fixed to the legs It and i6, adjacent their upper ends, is a substantially horizontally extending U- shaped frame 34, to the bightv portion of'which is fixed a serrated blade 36, beneath which paper to enable separate aprons to be severed from the supply roll. A similar, substantially U- shaped frame 38 is secured to the legs l4 and ii adjacent their upper ends and projects in a direction opposite the frame 34 to form a reinforcing and stiffening structure.

Secured to the leg it of the frame 12 is a vertical guide member designated generally 40 which comprises a standard 42 which is provided at opposite side edges with substantially U-shaped flanges M, and formed in the standard 42 intermediate its upper and lower ends is an opening 46 which aligns with the opening iii in the leg It, as will be readily understood upon reference to Figure 2. Mounted for vertical sliding movement on the standard I4 between the guide flanges H is a carriage 48 which is provided near its upper and lower ends with internally screw-threaded openings 50 and 52, respectively. for the reception of the threaded ends of bearing studs BI and 56. (Figure 2.) Mounted for rotation on the upper saw adjacent its end remote from the carriage 40 with an outstanding peripheral flange II. the periphery of which is preferably knurled for. frictional contact with the tape as it leaves the roll II.

A support spindle It is equipped at one end with a head 08 which is shouldered. as at 10. to enter the opening II in the leg ll of the frame II, while the opposite end of the spindle I! is externally screw-threaded, as at I2. for entrance into an internally screw-threaded nut II which, as illustrated in Figure 2. bears against the outer side of the leg II of the frame l2. thus to hold the spindle 80 in a horimntal position. Mounted for rotation on the spindle I is a thimble ll provided at one end with an outstanding annular flange II, and positioned about the spindle ll between the flange ll of the thimble I6 and the head 68 of the spindle ii is a compression coil spring III which bears against the head 08 and flange l0 yieldingly to urge the thimble 10 toward the guide plate The thimble I0 is preferably of a diameter readily to flt into the central opening of a roll of masking paper 0!, so that the roll may be supported for rotation on the spindle 80.

In use, a roll 02 of masking pap r is mounted on the thimble l0, and the thimble is then placed between the legs I4 and I of the frame I! and the spindle it entered through the opening I. and the bore of the thimble 18, to pass through the opening 2| in the leg ii. The nut ll is then threaded on the threaded end 12 of the spindle BI, and the roll 02 of masking paper will be held in the machine in proper position for operation. The spring II yieldingly urges the roll of paper against the guide plate 2| which, in turn, is yieldingly held against the end of the thumb screw 24, so that by turning the thumb screw, the guide plate 26 may be moved to shift the roll II of masking paper longitudinally on the spindle 0|. The roll it of adhesive tape having been mounted on the core 58, the machine is ready for operation. A portion of the adhesive tape is unrolled from the roll it and passed around the pressure roller 82 as illustrated in Figure 3 so that its adhesive surface is turned toward the roll 02 of masking paper. The tape is pressed against the roll 82 of masking paper by the'knurled flange 0| of the pressure roller 62 and as the paper apron is unrolled from the roll of masking paper 02, it will be obvious that it will carry with it a length of adhesive tape which will overhang one edge of the paper as it leaves the roll so that when an apron is severed from the roll by the serrated blade 30, it will have firmly flxed to its edge a strip of adhesive tape which may be employed to support the apron in masking relation to the object being finished. Owing to the fact that the flange it is spaced inwardly from the edge of the roll 02 as illustrated in Figure 2, it will be obvious that the pressure on the adhesive tape is applied on the edge'thereof nearest the centeroftheroll |I,andinspacedrelationto the end ofthe roll 82 so as to avoid any possibility of forcing the adhesive tape into engagementwlthanyportionoftheroll II otherthan thattowhlchitistobeattached.

While inthe foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and .scope of the invention as claimed.

Having described the invention, claimed as new is:

1. An apparatus for preparing masking aprons comprising a base, a U-shaped frame secured at its web portion to said base, a masking paper roll. means for rotatably retaining said roll on the legs of said frame spaced from said base. a vertical support secured to one leg of said frame, a carriage slidably and guidingly mounted on said support, an adhesive tape roll rotatably mounted on said carriage, a presser roll rotatably mounted on said carriage beneath said adhesive tape roll, said pressure roll including a peripheral flange adapted to contact the tape and urge it against the masking paper-roll, and means for adjusting said masking paper roll relative to said pressure roll.

what is 2. The combination of claim 1 wherein said flange at one of its ends, and a spindle positioned in said thimble and lournaled at its ends in the legs of said frame.

3. The combination of claim 2 wherein said last-named means includes a guide plate secured at one of its ends to the other leg of said frame and adapted to press against said masking paper roll. a set screw through said other leg bearing against said guide plate, and a spring about said spindle interposed between said one leg and the thimble flange urging said masking paper roll towards said guide plate.

4. An apparatus {or preparing masking aprons comprising a frame, means for mounting a. roll of masking paper in the frame for rotation about an arts, a carriage mounted for gravitational movement toward the said axis, means for rotatdblu mounting a roll of adhesive tape on the carriage, or presser roller rotatabl'g mounted on the carriage in a position to bear against the masking paper roll with a length of withdrawn tape between the peripheries of the presser roller and the roll of paper to urge the tape into ddhesiue contact with the paper, and means for lateral positional adjustment of the roll of paper and the roll of tape relative to each other.

' WILLIAM. A. BIHARY.

REFERENCES CITED The following references are of record in the

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