US2958890A

US2958890A - Brush device

Info

Publication number: US2958890A
Application number: US634529A
Authority: US
Inventors: Charles T M Manberg
Original assignee: Husqvarna Borstfabrik AB
Current assignee: Husqvarna Borstfabrik AB
Priority date: 1956-01-19
Filing date: 1957-01-16
Publication date: 1960-11-08
Anticipated expiration: 1977-11-08

Description

Nov. 8, 1960 c. T. M. MANBERG 2,958,390

BRUSH DEVICE Filed Jan. 16, 1957 9144 914-3 .9 ifi-J 9144 9 l I I l\\ States Patent 2,958,890 Patented Novo-8,

2,958,896 BRUSH DEVICE CharlesT. M. Manbel'g,v Huskvarna,.Swedemassgnor to Aktiebolaget Husqvarna Burstfabrik, Huskvama, Sweden, a joint-stock company` of Sweden Filed Jan. 16, 1957, ser. No. 634,529 l Claims priority, application Sweden Jan. 19, 1955 s claims. (c1. 1s-'199') The invention relates to brush strips and brushes comprising a plurality of brush strips of the type having a layer of bristles bent around a wire. v

A brush strip of this type is described in my co-periding appl'cation Serial No. 586,527, `tiled* May 22, 19,56, now Patent No. 2,903,727 'according t'o which the layer of bristles is folded around the wire and sewnl together.

,An object of the invention is to have the two folded portions separated from 'eachother and to obtain amore straight form of the bristles.

Another object ofv the invention is to reduce the fric't'on between the base portions of the bristles and prevent burning. v

A further object of therpinvention isito provide lseparating layers between the folded portions of the bristles in a simple manner and w'thout essentially increasing the width of the base portion of the brush strip.

A still further object of the invention is to provide a brush strip which is flexible and can be bent into any desired form.

St'll another object of the invention is to provide a brush strip which requires no holder embracing the wire and the bristles.

Other objects and advantages of this invention will be apparent from the following description and the accompanying drawing, wherein:

Fg. 1 is a cross sectional view of a brush strip according to one form of the invention;

Fig. 2 is a side elevation of the brush strip shown in Fig. l;

Fig. 3 is a top View of a strip of material; and

Fig. 4 is a partial cross sectional view of one form of a brush comprising a plurality of brush Strips according to Fig. 1.

The core of the brush strip consists of a wire 5 of metal, plastic or any other suitable material, 'and around this wire are folded two connected strips 1, 2 of a materfal, such as paper, cardboard, fabric or the like and preferably of an elastic material, such as a crape paper, or of another material, such as cardboard. According to Fig. 3 the strips 1, 2 of the same width are formed from a single strip of thick paper, in which rectangular central portions are punched to form bridges 3 separated from one `another by intermediate openings 9, the extent of the individual bridges in the longitudinal direction of the brush strip being considerably less than the extent in the same direct'on of the individual openings. The strips 1, 2 are folded together around the wire without gluing so as to be located entirely above the wire 5, and they have preferably together substantially the same thickness as the width or diameter of the wire. In order to make them somewhat flexible in their own plan their outer edges are cut through at short intervals as shown at 4. A layer of brstles 7 of any desired material is thereafter folded over the wire 5 and the strips 1, 2 and then sewn together by a seam 6 to a unit. The seam preferably passes through the strips 1, 2 but may also be located above the strips.

The brush strip may be produced in the following wjay. A l'ayer of parallel bristles are fed from a hopper onto two parallel endless belts. The punched strip 1, 2 is` fed from a roller onto the bristles, and thereafter the wire 5 is fed from another roller onto the strip. A rotating press`ng device folds the bristles and the strip simultaneously to the position shown in Fig. 1, and while maintained in this position the brush strip passes a sewing machine, whereafter it is wound up on a storage drum from which it may later be drawn olf in connection with the manufacture of brushes.

The bridges serve to keep the two strips 1, 2 in proper position during the feeding and folding operation, and as they are rather narrow the bristles are distributed during the feed and folding operation in such a way that the width of the base of the brush str'p in spite of the thickness ofy the bridges will be substantially constant and as .small as without bridges, which is of advantage for obtaining a compact brush. The strips 1, 2 can also form separate strips which are connected by paper bridges glued thereto, whereby material is saved.

The brush strips may be used for making brushes of d'fferent kinds. A plurality of straight brush strip-s may be united in a Suitable manner, or a single, flexible brush strip may be wound to a helical or other form. Between the adjacent brush strips it is preferred to apply a strip of lpaper or cardboard 8 which may be provided with cuts `at one or `both ends'for making the strip flexible in its own plan. Thisy strip may be glued on both sides and pressed against the brush strips so that a stiff base portion of a brush unit is obtained. lf the strip 8 extends down into the space between the Wires the br'stles between the strip 8 and the strips 1, 2 will not be pressed too hard together which has been found to be of advantage. The bristles are evenly distributed in the transverse direction of the brush strips, and between all adjacent layers of substantially radial bristles free spaces are obtained whereby a good vent lation is obtained so that heat which is generated by friction between the bristles and often causes burning, may be better carried olf.

When making cylindrical brushes a brush strip and a strip 8, which passes from a roller through a glueing apparatus, can be wound together upon a cylindrical core and thereafter be pressed together in axial d'rection, until the glue has settled. The core can then be removed, and a stiff brush unit is obtained which can easily be mounted on a rotatable core in a brushing machine.

The brush strip and the strip S can also be wound upon each other in a spiral form for obtaining a flat, a conical or a round brush surface.

I claim:

1. A brush strip, comprising a wire, two strips of material having together substantially the same tota-l thickness as the Wire and extending along and in direct contact with each other and being united by a series of bridges, which are bent around the wire and are separated from one another by intermediate openings, the extent of the individual bridges in the longitudinal direction of the brush strip being considerably less than the extent in the same direction of the individual openings, a layer of free bristles bent around the wire and around said strfps of material and being sewn together with said Strips of material for holding the base portions of the bristles so as to extend parallelly from the Wire, `and an intermediate spacing layer of material prov'ded between adjacent portions of the brush strip and glued to the bristles for forming a solid brush body.

2. A brush strip, comprising -a wire, two strips of material having together substantially the same total thickness as the wire and extendng along and in direct contact with each other and being united by a series of bridges, which are bent around the Wire and are separated from one another by intermediate openings, the extent of the individual bridges in the longitud'nal direction of the brush strip being considerably less than the extent in the same direction of the individual openings, said bridges and said two strips of materia-l forming a single ribbon with a series of openings provided between the bridges, a layer of free bristles bent around the wire and around said strips of material and being sewn together with said strips of material for holding the base portions of the bristles so as to extend parallelly from the wire, and an intermediate spacing layer of material provided between adjacent portions of the brush strip and glued to the bristles for forming a solid brush body.

3. A brush strip, comprising a wire, two strips of an easily exible materfal having together substantially the same total thickness as the Wire and extending along and in direct contact with each other and being united by a series of bridges, which are bent around the wire and have a width considerably less than the width of intermediate openings, said bridges and said two strips of material forming a single ribbon with -a series of openings provided between the bridges, a layer of free bristles bent around the wire and around said strips of material and being sewn together with said strips of material for holding the base portions of the bristles so as to extend parallelly from the wire, and yan intermediate spacing layer of material provided between adjacent portions of the brush strip and glued to the bristles for forming a solid brush body.

4. A brush strip as claimed in claim 3, characterized in that the single ribbon is formed of a paper strip having the opposite edges cut through at short intervals for making ysaid two strips of material more ilexible in their own planes.

5. A brush strip, comprising a wire, two strips of material having together substantially the same total thickness as the wire and extending along and in direct contact with each other and being united by a series of br'dges, which are bent around the wire and are separated from one another by intermediate openings, the extent of the individual bridges in the longitudinal direct'on of the brush strip being considerably'less than the extent in the same direction of the individual openIngS, said bridges and said two strips of material forming a single paper ribbon with a series of openings provided between the bridges, a layer of free bristles bent around the wlre and around said strips of material and being sewn together with said strips of material for holding the base portions of the bristles so as to extend parallelly from the wire, and an intermediate spacing layer of material provided between adjacent portions of the brush strip and extending inwards through the `space between two-adjacent p-ortions of the wire, and said spacing layer being glued to the bristles for forming a solid brush body.

References Cited in the tile of this patent UNITED STATES PATENTS 1,152,180 Jarvis Aug. 31, 1915 1,183,434 Chapin May 16, 1916 1,663,584 Cleaves Mar. 27, 1928 1,769,145 Kranz July 1, 1930 FOREIGN PATENTS 27,777 Great Britain 1906