US1677920A

US1677920A - Method of making brushes

Info

Publication number: US1677920A
Application number: US198076A
Authority: US
Inventors: Cecil R Hubbard
Original assignee: Garlock Packing Co
Current assignee: Garlock Packing Co
Priority date: 1927-06-11
Filing date: 1927-06-11
Publication date: 1928-07-24
Anticipated expiration: 1945-07-24

Description

July 24, 1928. 1,677,920

C. R. HUBBARD I METHOD OF MAKING BRUSHES Filed June 11, 1927 Jam,

w, INVENTOR By Attorneys,

Patented July 24, 1928.

UNITED STATES" V v 1,677,920 j PATENT OFFICE.

CECIL R. HUBBARD, F NEWARK, NEW YORK, ASSIGNOR TO THE GARLOCK PACKING COMPANY, OF PALMYRA, NEW YORK, A CORPORATION 01' NEW YOBK.'

METHOD OF MAKING BRUSHES.

Application filed June 11, 1027.. Serial No. 8,076.

This invention relates to improvements in methods of making brushes. Although adapted for general application, it is herem disclosed as applied to methods of making heat-resistant brushes adapted for use in cleaning tin from tinning rolls used in the process of coating metal plates with tin.

It is an object of the invention to simplify and reduce the manual labor involved in as- W sembling and securing the layers of material of which brushes of this character are made.

It is a further object of the invention to produce a brush the respective layers of which may be more uniformly assembled in registration with each other and more firmly clamped together.

Another object of the invention is to produce a brush having an even and well-de fined working surface which may be either at right angles to the layers of material of which the brush is composed, or at any desired degree'of inclination with respect to such layers.

It is a still further object of the invention to produce brushes in pairs which shall be duplicates or substantial duplicates of each other as to form, size, material and construction.

In the accompanying drawings used as an aid in'disclosing the method of making brushes in acordance with the invention:

Figure l is a conventional representation in end View of a pair of squeezing rolls such as are commonly used in plate-coating machines, one of said rolls being indicated as partly broken away and the other as having a brush and brush-mounting means whereby the brush may be held in proper position to remove excess tin from the surface of the roll.

Figs. 2 and 3 are similar Views of corresponding parts of tinning machines, the brushes being represented in different rela tive positions with respect to the axis of the machine than that of the brush illustrated in Fig. 1.

Fig. 4 is a perspective view of a sheet of material folded into a structure having a plurality of superimposed layers and secured together in readiness to be severed lengthwise of the structure to form one or more brushes. In this figure the plane of severance is indicated'as being perpendicular to the layers of the folded structure.

Fig. 5 is a similar view of one of a pair of brushes which may be produced by sever ng the folded structure, illustrated in F1g. 4, intermediate its folded margins.

F 1g. 6 is a view in cross-section through a folded strip of material similar to that lllustrated in Fig. 4, the strip being indicated as being severed along a plane disposed at a somewhat different angle with respect to the component layers of the structure than that indicated in Fig. 4.

Fig! 7 illustrates in cross-section two duplicate brushes which may be formed by severing the folded structure shown in Fig. 6.

In the coating of sheets of metal with tin, it is common practice to pass the metal sheets into and out of a bath of molten tin, over which is floated a bath of oil, and to provide within the oil bath, above the surface of the molten tin, one or more pairs of squeezing rolls by means of which the coated sheet is elevated from the bath and at the same time relieved of excess tin as it is passed between the rolls. The excess tin which is transferred from the surface of the plate to the surfaces of the rolls is commonly removed by brushes provided with suitable mounting means by which they may be yieldingly held against the surface to be cleaned.

In Fig. 1 of the drawings, 20 represents one of a pairpf squeezing rolls of the abovedescribed character, 21 being a fragmentary portion of the complementary roll of the pair. 22 represents, in cross-section, a plate of metal indicated as being fed upwardly between said rolls as they are rotated in directions indicated by the arrows. It is a function of the

rolls

20, 21 to permit films 23, 24 of tin of uniform predetermined thickness to pass beyond their lines of contact with the coated plate, the excess tin of the

films

25, 26 being caused to fall or run back into the bath.

In order to remove any excess tin which is carried by the surface of a roll beyond its line of contact with the coated plate, a film of which is indicated at 27 in Fig. 1, a brush 28 is usually held in close contact with the surface of the roll, by which the surface is wiped clean before it is again brought into contact with the coated plate. A conventional representation of a mounting means for such a brush is illustrated in Fig. 1 as comprising a brush-holder 29 slidably mount- -ed upon a guide-bar 30 projecting upwardly from a support 31 which may be secured to any stationary part of the structure. The brush ma be clamped between a seat 32 in the ho der and a clamping plate 33 by securing means of any appropriate character, such as the bolt 34 and nut 35, and the holder may be caused to hold the brush in yielding contact with the surface of the roll by means of a suitable spring 86.

In Fig. 1 the brush is indicated as being mounted directly below the axis of rotation of the roll,so that the working surface of the brush is substantially perpendicular to the laminations 37 of which such brushes are usually built up.

In Fig. 2 the brush-holder 29 is so positioned as to maintain the brush 28 in a position somewhat closer to the point of contact between the roll and the plate, the brush having a working surface disposed at an inclination to its laminations 37 In Fig. 3 the brush holder 29" is so positioned as to maintain the brush 28" at a somewhat greater distance from its line of contact with the plate, the working surface of the brush being appropriately inclined with respect to its laminations 37 to make snu contact with the surface of the roll.

Tinning machines employing pairs of squeezing rolls having brushes held in contact with their surfaces to remove excess tin are well known in the art and constitute no part of the invention herein sought to be protected, which relates to brushes which, if made of appropriate material, are adapted for use in the cleaning of tinning rolls, and to a method whereby such brushes may be constructed.

In its broadest aspect the method of making brushes in accordance with this invention consists in folding a strip of material, or a plurality of said strips, into a structure comprising a plurality of superimposed layers, said structure having folds along two margins, and, after firmly securing the layers together, severing the folded structure between said folded margins to produce one or more brushes in which the severed edges of the material all lie in a substantially plane surface. The building up of the laminated structure, from which the brush is to be made, by folding a single strip of material to produce the laminated structure and in securm the layers together before the cut is made w ich produces the working surface of the brush, requires much less manual labor than is involved when brushes are made by superimposing separate strips of material cut to sizes intended for use in the finished brush. The securin of the layers may be more readily eifecte if the laminated structure is made by folding a single piece of material. the working surface formed by cutor more sheets ofmaterial may be used to build up the folded structures when re uired by the size or form of brush to be pro uced.

- One method of constructing a brush in accordance with the invention will be described with the aid of Figs. 4 and 5 of the drawin s. A sheet of any suitable material,

perfera ly asbestos fabric is folded into a structure comprising a plurality of closed accordion plaits, each plait comprising a folded marginal ortion 38 and intermediate layers 39. The olded material is then firm- 1y secured together in any appropriate 1 manner, such securing means being hereln indicated as rows of stitching 40 preferably disposed in parallel relation with the folded margins of the plaits. The folded and stitched structure may then be severed intermediate the folded margins to roduce one or more finished brushes, a suita 1e plane'of severance 'for such purpose being indicated in broken lines at 41, Fig. 4. If but one brush is to be constructed from each folded structure, this plane of severance may be relatively close to one of the folded margins of'the structure. Preferably a single folded structure will be made of sufficient size to be cut into at least two brushes. As indicated in Fig. 4, the plane of severance is shown as being midway between the folded margins and perpendicular to the planes separating the layers of material. The severing of the structure along a plane of severance such as that indicatedin Fig. 4 results in two brushes of equal size, form, material, and structure. One such brush 28, as indicated in Fig. 5, is adapted for use in a relative position with respect to the tinning roll illustrated in Fig. 1.

In Fig. 6 a folded structure, similar to i that indicated in Fig. 4, is represented as having been severed along a plane of severance 42 at a slight inclination to the planes separating the layers of the structure, thereby resultmg in two brushes 28', 28", either of which is adapted for use in a position relative to a tinning roll indicated either in Fig. 2 or in Fig. 3.

It will be apparent that brushes of the above described character can be made of any appropriate material. When used as cleaning brushes for tinning rolls, they should be of heat-resistant material such as asbestos fabric. material should referably be folded on the bias as indicated by diagonal lines in Figs. 4: and 5.

Although parallel lines of stitching have been shown as the preferred means of securing the layers of the folded structure together, it will be obvious that the stitching need not necessarily run in parallel lines, and that staples or other appropriate fastening means mi ht be used instead of stitching.

When it is desired to make two like brushes from each folded structure, fastening elements will be located along the folded margins at suitable distances therefrom and between the margins and the longitudinal center line of the structure. Preferably this stitching will be located at a'material. distance from the plane of severance in order that ample material may be allowed to. ro-

- vide for a wearing away of the 'wor ing surface of the brush without bringing. the fastening elements into contact with the surface agamst which the brush is used.

The invention is not intended to be limited to the specific manner of. ractieing the method herein selected for purposes of illustration, but should be regardedas covering modifications and variations thereof within the scope of the appended claims.

What is claimed is:

i l. The method of making brushes, whic consists in folding sheet material into a structure having a plurality of superimposedlayers and havmg folds along two margins,

When made of fabric, the

layers andhaving folds along two margins, stitching the layers together, and severing the structure intermediate it folded mar 'ns. '4. The method of making brushes, w 'ch consists in folding sheet material into a structure comprising a pluralit of closed accordion plaits, securing the plalts together, and severing the plaited structure intermediate the mar inal folds. 5. The met 0d of making brushes, which consists in folding sheet fabric into a structure comprising a plurality of closed accordion plaits, the fa ric being folded on the bias, securing the plaits together, and severing the plaited structure intermediate the marginal folds. v

6. The method of making brushes, which consists in folding sheet material into a structure comprising a plurality of closed accordion plaits, stitching said plaits together, and severing the plaited and stitched structure intermediate the folded margins.-

7 The method of making brushes, which consists in folding sheet material intoa structure having a plurality of superimposed layers and having folds along two margins,

securing said layers to ether, and severin the structure mldway etween said folde mar 'ns to produce a pair of duplicate brus es.

8. The method of making brushes, which consists in folding sheet material into a structure comprising a pluralit of closed accordion plaits, securing the plalts together, and severing the structure midway between its folded margins to produce a pair of duplicate brushes.

9. The method of makin heat-resistance brushes which consists in olding sheet asbestos fabric into a structure comprising a plurality of closed accordion plaits, stitchin said plaits together lengthwise of the folde structure between its longitudinal center line and its folded margins, and severing the structure 'midwa between said margins to produce a pair o duplicate brushes.

In witness whereof, I have hereunto signed my name.

\ CECIL R. HUBBARD.