DE1095782B - Process for the production of brushes or brush elements with a plastic carrier - Google Patents

Description

GERMAN

The invention relates to a method for producing flat brushes or brush elements Od. The like. The working elements of which are of any nature, such as plastic elements, sponge-like Elements, bristles, etc. m., are fastened in a grooved support body.

According to a known method, the carrier is formed from a flat metal strip, the Edges are first bent over and then pressed against the bristles under pressure and deformation.

Attempts have also been made to produce such brushes in such a way that the pressing process of a corresponding Kuststoffträgers combined with the immediate insertion of the working elements in the carrier was, but with this method you are forced to work in the heat, which is complicated Plants for processing plastics are required.

It is also known to sandwich the bristles between a rigid brush body and an elastic insert, on which the bristles are lined up to be clamped. By applying such a core insert however, the manufacture of the brushes is complicated and expensive. As this known manufacturing method In addition, several different types of work steps are required, is a simple assembly line production not possible.

The method according to the invention, on the other hand, is based on the assumption of prefabricated U-profiles as carriers To use plastic that has a certain elasticity, and taking advantage of this elasticity To insert work elements into the profile after its flanks have been spread apart, with the same then hold the working elements used clamped due to their elasticity.

This method offers the advantage of being able to work without any heating and using profiles that are usually found in stores. Furthermore, any damage or Avoid cutting the work elements, in contrast to those brushes, which use metal strips as a carrier be used. After all, the tools needed to manufacture them are extremely simple and cheap.

The invention is explained in more detail below with reference to the drawing.

Fig. 1 shows schematically a side view of the tool used to manufacture the brushes while working, and

FIGS. 2, 3 and 4 are sectional views along the lines AA, BB and CC of FIG. 1.

According to the invention, a substantially U-shaped plastic profile 1 (Fig. 2), which is rolled up or is supplied in the form of long rods, which profile is attached to a Method of manufacture

of brushes or brush elements

with plastic carrier

Applicant:

Maria Clothilde Baer, née Donini,
Bologna (Italy)

Representative: Dipl.-Ing. L. Hain, patent attorney,
Munich 5, Rumfordstr. 40

Claimed priority:
Italy January 31, 1959

Level 3 is drawn, which represents the bottom of a channel 2 (see Fig. 2). During the feed in the channel 2, the profile 1 encounters a spreader element 4, which engages in the profile and spreads its flanks apart, as Fig. 3 shows. The expansion member 4 has such a shape that it gradually spreads the profile apart, without causing a permanent change in shape of the plastic. After the spreader 4 the profile remains spread apart for a certain distance, with additional lateral if necessary Guide tongues can be used to accomplish this. This section describes the Working elements of the brush by means of an insertion shoe 6 and a rotating disc 7 into the Wedged open profile. In the example shown, the working elements of the brush consist of one Strip 8 made of spongy material and made of a metal wire 9, which runs along the central fold line of the strip 8 comes to rest. After the disc 7, the flanks of the profile can gradually return close to take their original shape and both the work material 8 and the To clamp wire 9 between them. The lateral rollers 10, 11 favor the closing of the profile and clamping of the work elements and complete

009 680/4

constant formation of the brush element, which is then cut into desired lengths.

Claims (3)

Patent claims: 1. Process for the production of flat brushes or brush elements, wherein the working elements, like bristles, spongy plastic strips and the like, are fastened in a grooved carrier, characterized in that a prefabricated, elastic plastic U-profile strips used is, in which the working elements of the brush mainly taking advantage of its Elasticity used after spreading its flanks and then predominantly through the elastic pressure of the flanks can be retained. 2. The method according to claim 1, characterized in that the prefabricated, rolled up or elastic plastic U-profiles supplied in long bars leads over a spreader, which spreads its flanks apart that one at the same time also the working elements arranged transversely in the form of a band and a metal wire along the center line of said belt advances and the working elements including the wire then wedged between the spread flanks of the profile, after which the flanks of the profile can be closed by means of guide elements and restores the original profile to in this way to clamp the working elements folded around the wire. 3. Device for performing the method according to the preceding claims, characterized by a table, by pull rollers for pushing the plastic U-profile along the table, by a spreader to spread the profile flanks apart, if necessary by holding tongues d. Like. To spread the flanks of the profile a desired distance apart to hold, by one or more supports for the drum, from which the Unwind work elements in the form of a band, through one or more carriers for the drum or the reel from which the metal wire unwinds by means of facilitating the wedging of the Work elements and the wire in the spread profile, through a guide for the Profile in which the working elements and the wire are already wedged, so that the profile flanks resume their original shape and clamp the working elements and the wire, and, if necessary, by lateral rollers acting on the profile flanks to achieve a more perfect one To effect clamping. Considered publications:
Swiss patent specification No. 121 475. 1 sheet of drawings 1 009 680/4 12.60