Abstract: A tool for the injection molding of toothbrush bodies consisting of at least two different, consecutively injection molded plastic components, comprising a pair of mold parts that can be moved relative to each other and that together form groups of parallel mold cavities, wherein one of the mold parts for each group of mold cavities has a recess into which a mold insert can be filled, partial cavities are formed in the mold inserts, each corresponding to a head area of a toothbrush body, two of four groups of mold cavities form a first group pair in which the first plastic component is injection molded, two more of the four groups of the mold cavities form a second group pair in which the second plastic component is injection molded; the mold cavities in each group are parallel to each other and to those of the other group pair; one group of each pair of mold cavities is offset perpendicular to a lengthwise direction of the mold cavities with respect to the other group; the mold cavities of a group of each gr

Abstract: For implant molding of toothbrushes pre-cut and pre-rounded fiber of thermoplastic material are used. Loose fibers are presented to an endrounding tool in a tuft or bundle and the free ends of the fibers are exposed to a working surface of the tool. Relative movement between the fiber ends and working surface causes the material of the fibers to be heated by friction of a predetermined intensity. The fibers while they are exposed to the working surface of the tool are permitted to flex laterally and are held in an axial direction of the tuft or bundle with their free ends commonly defining a surface different from a plane which is perpendicular to the axial direction, thereby achieving a substantially consistent flexing resistance throughout the cross-section of the tuft or bundle with respect to lateral deflection upon engagement by the endrounding tool.

Abstract: Method for producing and packaging tooth brushes (2) which at least consists in making several devices available, including at least one device (3) for supplying brush bodies (4) or parts thereof, at least one brush manufacturing device (5, 5A, 5B) and at least one packaging device (6) for packaging the produced tooth brushes (2), characterized in that use is made of a closed conveyance circuit (7) which can co-operate at least with the above-mentioned devices (3, 5-5A-5B, 6) to convey half-finished products, end products respectively, between the above-mentioned devices (3, 5-5A-5B, 6).

Abstract: A method and device for forming fiber packs for manufacturing brushes from a fiber strand. The fiber packs (2) are formed from a fiber strand (1) which is provided with a cover (4) by cutting off parts (5) of this fiber strand (1), wherein, before such a part (5) is cut off, the cover (4) is entirely removed from said part (5).

Abstract: A method of producing brushes by connecting platelets of a plastics material, having each tufts of brush bristles attached thereto and projecting from a first face, to an attachment surface portion of a brush body made of plastics, in particular the same plastics, by means of ultrasonic welding or glueing. Each of the platelets has a peripheral rim facing the brush body and having an edge formed thereon which acts as an energy concentrator in ultrasonic welding.

Abstract: Method for arranging toothbrush bodies, which toothbrush bodies (3) either or not are already provided with brush hair, characterized in that this method consists in supplying the toothbrush bodies (3) to be arranged; detecting the position of the supplied toothbrush bodies (3) by a visual recognition system (4); controlling a sorting element in function of the detections performed by the recognition system (4); and separating, by this sorting element, at least a number of the toothbrush bodies (3), as well as arranging them at least partially ordered in discharge means (6).

Abstract: In a method of melting together axial ends of bunched fibers of thermoplastic material, the fiber ends are brought into contact with the heated surface of a stamp. The body of the stamp is heated by controlling an electric current passing through it. In one embodiment the stamp is cooled by a flow of compressed air before the stamp is separated from the fiber ends. In another embodiment, the stamp is separated from the melted fiber ends, heated to a higher temperature to vaporize any residual fiber material, and cooled by exposure to compressed air until it has no more than the temperature for melting the fiber material.

Abstract: A tool for injection molding of toothbrush bodies of two different plastics components comprises two mold parts which can be moved relative to each other and together constitute four groups of parallel mold cavities. One of the mold parts has a recess for each group of mold cavities. A mold insert fits into the recess. Partial cavities are formed in the mold inserts, which partial cavities each correspond to a head portion of a toothbrush body. A first plastics component is injected into a first pair of groups of the mold cavities and a second plastics component is injected into a second pair of groups of the mold cavities. The mold cavities of the first pair of groups are arranged on the one side and those of the second group are arranged on the other side of a rotatable carrier arm to which the mold inserts are fastened. The mold cavities are arranged in each group parallel to each other and so as to have the same orientation.

Abstract: Method for manufacturing brushes, whereby, on one hand, fibers (3) are supplied to at least one filling tool (4) by means of at least one auxiliary device (15) comprising at least two fiber loading chambers (16-20) and, on the other hand, said fiber loading chambers (16-20) are replenished by taking up fibers (3) from at least two respective fiber supply channels (8-12), whereby, by means of the filling tool (4), the fibers (3) are inserted into brush bodies (6), characterized in that, on one hand, the supply of the fibers (3) from the fiber loading chambers (16-20) to the filling tool (4) and, on the other hand, the replenishing of the fiber loading chambers (16-20) with fibers (3) from the fiber supply channels (8-12) is realized by means of working cycles which as such are independent.

Abstract: In order to attach brush bristle tufts onto carriers made of thermoplastic material, which are formed with multiple holes according to a desired tuft pattern, the bristle tufts are first inserted into the holes in such a way that the bristle tips that are to be used protrude from one side while the bristle ends protrude only slightly from the holes on the opposite side. A heated punch has a multiplicity of conical or pyramidal projections. The projections of this punch penetrate between the holes into the mass of the carrier so that this mass softens and is pushed laterally into the interstices of the bristle tufts. In this manner, a tight interlock is created between the material of the bristles and that of the carrier.

Abstract: Method for manufacturing brushes, characterized in that a device is applied consisting of at least one carrier (2) with openings (3) which are mutually arranged according to a certain pattern, whereby the fiber bundles which have to be provided in a brush body (5) can be put in this carrier (2), and whereby this method further consists in the combination of at least four steps (6-8-9-11), respectively, the lateral separation of fiber bundles (4) from at least one quantity of loose fibers (7); the provision, in a mechanical manner, step-by-step, of the aforementioned fiber bundles (4) in the aforementioned carrier (2); the transfer of the fiber bundles (4) which are placed in the carrier by means of this carrier (2) to a holder (10); and, by means of this holder (10), the fixation of the fiber bundles (4) in the brush body (5), or at least in a portion of the brush body.

Abstract: A method and device for manufacturing brushes. The device includes at least one carrier (2) with openings (3) which are mutually arranged according to a certain pattern. The fiber bundles (4) are separated laterally from at least one quantity of loose fibers (7). The fiber bundles (4) are inserted in a mechanical manner, step-by-step, in the openings (3) of the carrier (2). An extremity of the fiber bundles (4) are transferred simultaneously in a mechanical manner from the carrier (2) toward a holder (10). The fiber bundles (4) are fixed in at least a portion of a brush body (5) by positioning the extremity of the fiber bundles (4) in a mold, such that the fiber bundles (4) extend through the holder (10). A synthetic material is injected in the mold and form at least a portion of the brush body (5).

Abstract: Separating system for elongated objects provided in bulk such as brush bodies, especially toothbrush bodies, characterized by the combination of a proportioning device that delivers individual objects that have been separated from the group. The separating system according to the invention comprises a selective transport means that conveys several jointly delivered objects at varying speed, thus separating them.

Abstract: Provided is a brush finishing machine including, arranged along an endless chain, finishing stations comprising at least one stamping press for marking the brush handles with decals transferred for application thereto from a foil advanced by an indexing mechanism provided upstream of the brush handles, the endless chain carrying at each chain link two brush bodies held spaced away from each other at the chain link, and the stamping press comprising two stamping dies located opposite the brush handles.

Abstract: A device for removing individual fiber tufts from a plurality of fiber bins of a brush making machine comprises a tuft remover, a counterpart matching the tuft remover and a movable slide arranged between the counterpart and the fiber bins. The slide has a plurality of through-passages each of which is associated with one of the fiber bins. The outer passages of the slide are inclined at an angle to the central passage. Between the central fiber bin and each of the outer fiber bins an associated ram is arranged. Each ram has an end face which faces the slide and either bears on one side surface area of the slide or applies pressure to the opposite end of one of the outer through-passages, depending on the respective position of the slide. The device allows the tuft remover to selectively pick up tufts of three different types of fiber.

Abstract: Method for manufacturing brush bodies for tooth brushes, in particular for injection moulding brush bodies (2) consisting of at least two components (5-9), of the type whereby at least one first injection moulding piece (25) is formed of a first component (5) in a first mould (3), consisting of at least two mould parts (4-6); whereby at least one second injection moulding piece (26) is formed by providing the first injection moulding piece (25) in a second mould (7), which also consists of at least two mould parts (8-10), and by providing a second component (9) on the first injection moulding piece (25) in the second mould (7); and whereby every injection moulding piece (25) formed in the first mould (3) is transferred to the second mould (7) by a transfer part (1 5) provided between the mould parts (4-6-8-10) of the above-mentioned moulds (3-7), characterized in that the injection moulding pieces (25) formed in the first mould (3) are secured to the transfer part (15) during the transfer to the second mould

Abstract: A tufting device for the filling tool of a brush tufting machine is provided which permits the operating stroke of the filling tool to be varied and adjusted without affecting operating speed and precision of operation. The tufting device has a guide block, a guide channel in the guide block, a tuft driver tongue driven with a reciprocating movement and movably received in the guide channel, and a header having a through channel aligned with the guide channel. The header and guide block are driven with a relative reciprocating movement towards and away from each other. The device further has a drive system with a rotating drive shaft, a cam on the drive shaft and a cam follower riding on the cam. The cam follower is driven by the cam with a reciprocating movement of a predetermined stroke length. The drive system further comprises a conversion mechanism for converting the reciprocating movement of a predetermined stroke length into a drive stroke of an adjustably variable length.

Abstract: Apparatus for rounding the ends of brush fibers made of thermoplastic material includes a system for moving a smooth treatment surface relative to brush fiber ends at a relative speed and for a selected time to cause the brush fiber ends to be heated to their plastic deformation temperature to cause the brush fiber ends to become rounded. The treatment surface includes at least a portion which has substantially no abrasion, grinding or impacting properties relative to the brush fibers but only substantially friction heating properties relative to the fibers. A method for rounding brush fiber ends is described using the described apparatus.

Abstract: Method for manufacturing brush bodies, more particularly brush bodies (1) made of synthetic material, which are provided with at least one insert (2), and wherein in the insert (2) is firstly covered by injection on one side in a die (5) and subsequently on the other side also in a die.

Abstract: A brush making machine with a mold for injection molding of brush bodies is disclosed. The mold includes a stationary mold part, a movable mold part and a pair of complementary mold parts fitting into a recess of the movable mold part. The complementary mold parts have tuft insertion holes. While one of the complementary mold parts fills the recess of the movable mold part and a brush body is injection molded with tufts of bristles embedded in the molding material, the other complementary mold part is in front of a tuft feeder for introducing tufts of bristles into the tuft insertion holes. The tuft feeder includes a plurality of tuft picking and transfer tubes which are movable to pick out tufts of bristles from a bristle container and to transfer each of these tufts to a position adjacent one of the tuft insertion holes. Plunger members penetrate into respective tubes to push out the tufts of bristles contained therein and to force them into and through the tuft insertion holes.