Abstract: A molded cosmetic applicator head having a core that supports an array of semi-conical bristles arranged in rows and columns, such that the surfaces of the bristles assume certain orientations, and wherein at least some of the bristles have at one or more prominent depressions and/or prominent protrusions located on a curved surface. A mold for an injection molded applicator head is also described.

Abstract: A molded cosmetic applicator head having a core that supports an array of perforated bristles arranged in rows and columns. Each perforated bristle comprises a textured lateral surface and a flat lateral surface, such that the surfaces of the bristles assume certain orientations. A mold for an injection molded applicator head is also described.

Abstract: The invention relates to a hairbrush, bristles for use in a hairbrush and a method of producing a hairbrush and such bristles.

Abstract: A process for making a toothbrush head comprising widthways adjacent sections, the process comprising the stages of first making the head in an injection moulding process with the sections relatively spaced apart from each other in a widthways direction, then secondly moving the sections of the so formed head relatively spaced closer to each other in a widthways direction. An apparatus for performing the process is also disclosed.

Abstract: A brush is injection molded in a multipart mold. The bristles of the brush are sequentially molded integrally with the base or handle. The bristles are extremely small and are injection molded in a unique molds. The bristle portion of the mold consists of a series a plates or semi-sphere cups, each of which is drilled with a diminutive drill bit. The plates and cups are then assembled so that the bores of the plates and cups are aligned to form the bristle containing portion of the mold. The mold portion for the bristles is injection molded with a first resin material. Then base or handle producing portion of the mold is injected with a second resin material. The selection of applicable resins, seize of bristles, spacing of bristles, viscosity of the to-be-dispensed fluid all considered in the defining of the amount of liquid to be carried and dispensed by the brush.

Abstract: An injection moulding process for making a toothbrush involving a stack mould assembly of at least three mould blocks (1, 2, 3, 4) arranged for use along a longitudinal stack axis (A—A), with two end mould blocks (3, 4), and an intermediate mould block (1, 2), with part mould cavities (11A, 21, 31, 41, 51) in the blocks. Plastic toothbrush skeletons are made in a cavity (11A, 21, 31) between the intermediate block (1, 2) and one end block (3), then elastomer parts are made in a cavity (41, 51) between the intermediate block (1, 2) and the other end block (4). Preferably the intermediate block (1) rotates so its part cavity (11A) faces the other end block (4). Stack mould assemblies (1, 2, 3, 4) for this process are provided. The assembly (1, 2, 3, 4) provides a compact mould with high output.

Abstract: Methods and apparatus for automated brush assembly are disclosed. A method of end-rounding bristle ends with an abrasive surface in random orbital motion relative to bristle tufts held in a movable gripper is described. A novel tuft carrier adapted to hold a plurality of bristle tufts in an arrangement suitable for direct mechanical insertion into the tuft chambers of a brush mold is also described. The tuft carrier has a plurality of tuft insertion cavities and a plurality of movable clamps, each clamp adapted to at least partially occlude one of the cavities when closed. Individual bristle tufts, having a fused end and a rounded or non-rounded bristle end, are transferred from a movable gripper to the tuft carrier by direct mechanical insertion. In addition, an apparatus for direct mechanical insertion of bristle tufts from a tuft carrier into the tuft chambers of a brush mold is described.

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: A method is disclosed of securing filaments to a toothbrush handle that is foldable along a longitudinal axis to acquire a functional configuration, the method includes providing a mold device for the toothbrush handle, the mold device comprising an upper member and a lower member positionable to define a mold cavity therebetween and a corresponding parting line therebetween, positioning filaments partially within the mold cavity, the filaments arranged linearly within the mold cavity in a plane that is parallel to the parting line, injecting a flowable plastic material into the mold cavity, and allowing the plastic material to cool and at least partially solidify within the mold cavity.

Abstract: A process for manufacturing hollow handled toothbrushes is disclosed. The process includes; a) providing a toothbrush mold having a head portion, a base portion, a toothbrush cavity located between said head and end portions and having walls, an injection port for molten plastic, and a gas injection port, wherein the gas injection port is positioned in the end of the base portion of the mold so that gas is injected into the mold cavity substantially centrally thereof and in a direction parallel to the longitudinal axis of the mold; b) injecting a predetermined amount of a molten plastic into the mold cavity to partially fill the cavity; and c) injecting at least one gas through the gas injection port into the cavity to direct the molten plastic against the walls of the mold cavity.

Abstract: An apparatus and method for producing brushes. The bristle bundles are loaded into a magazine which includes part of a cavity for an injection mold. The magazine is mated with the remainder of the injection mold and the brush handle injection molded around the bristles. The bristles may be profiled, trimmed, end-rounded, fused, or otherwise processed before the handle is injection molded. In addition, the handle of the brush may be formed in two injection molding steps of two different materials. An apparatus is taught which enables the brush to be produced, optionally ornamented, and packaged on a single machine.

Abstract: An apparatus is provided that includes a mold that includes a first cavity defining a toothbrush body, a first injection unit in fluid communication with the first cavity and a second cavity, and a second injection unit also in fluid communication with the first cavity. An apparatus is also provided that includes a mold that includes a first cavity defining a toothbrush body, a second cavity defining a toothbrush body, where the first cavity and the second cavity define substantially identical toothbrush bodies, a first injection unit in fluid communication with the first cavity and a second injection unit incapable of being in fluid communication with the second cavity.

Abstract: An apparatus and method for producing brushes. The bristle bundles are loaded into a magazine which includes part of a cavity for an injection mold. The magazine is mated with the remainder of the injection mold and the brush handle injection molded around the bristles. The bristles may be profiled, trimmed, end-rounded, fused, or otherwise processed before the handle is injection molded. In addition, the handle of the brush may be formed in two injection molding steps of two different materials. An apparatus is taught which enables the brush to be produced, optionally ornamented, and packaged on a single machine.

Abstract: A machine and method for producing bristles and a support surface for the bristles, are disclosed. An extruder feeds material from a supply source to an extrusion die and a forming die. The circumferential surface of the drum includes a plurality of recesses in the desired shapes and patterns for forming the bristles. In addition, a wide shallow groove in the extrusion die is formed in the desired shape of the bristle support surface. As the fluid material is extruded between the extrusion die and the forming die, the material fills the recesses in the drum that are facing the extrusion die as well as the groove in the extrusion die. The drum rotates to expose empty recesses and to rotate the filled recesses and material in the groove away from the extrusion die. As the fluid material is rotated away from the extrusion die, it cools and solidifies.

Abstract: The present invention relates to a method of producing brushes, especially toothbrushes, which comprise a brush body and at least one bristle bundle composed of a plurality of oriented bristle filaments, said method comprising the steps of introducing said bristle bundle into a channel, which is formed on a moulding tool component, partially melting said bristle bundle at its fixing-side end so as to form an enlargement, closing the moulding tool and filling it with a flowable material. According to a first aspect of the present invention, the method according to the generic clause is further developed in that at least a weakened length area of the bristle filaments, which is created when the bristle bundle is partially melted, is completely surrounded by the enlargement. According to a further aspect of the present invention, it is suggested that hot gas should be used for forming the enlargement.

Abstract: The composite brush mold includes a) a first component that includes a pattern of holes extending from a first surface of the first component to a second surface of the first component, the holes being configured to receive tufts that include at least one bristle, and b) a second component that includes a pattern of fingers that correspond to the pattern of holes, the fingers extending into the holes to form end walls.

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 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.

Abstract: A process for joining bristle bundles to a plastic bristle carrier, wherein the bristles of each bundle are melted at their fastening-side ends, accompanied by the formation of a thickened portion. The bristle carrier is provided at the bristle reception side with holes for receiving the thickened portions. The bristle bundles with the thickened portions are pressed into the bristle carrier, with a space above a bristle receiving side and between the bristle bundles, annularly surrounding the bristle area, being sealed against the bristle carrier, and with material rising during pressing on pressure application and filling the sealed area being displaced and compressed.

Abstract: For injection molding of tooth brushes from two different molding material components with tufts of bristles incorporated in the head portions of the brush bodies a molding machine is proposed which includes a tuft loading station, a first injecting station associated with the first material component and a second injecting station associated with the second material component. In one or each injecting station, the stationary molding block has a recess, and a movable mold insert part fits into this recess to complete the stationary mold block. The movable mold insert part is provided with tuft insertion holes and can be transferred to the tuft feeding station where tufts of bristles are loaded into the tuft insertion holes so that they have their inner ends projecting into the mold cavity portion defined by the movable mold insert part. Production of tooth brushes is a continuous sequence of tuft loading and injecting steps.

Abstract: A device for molding a buffer cap at the same time of fixing the cap to the bristle base implanting head of a toothbrush body preform. In the buffer cap molding and fixing device, a stationary molding plate is coupled to a mounting plate by a stop rod such that it is limited in its moving distance. The stationary molding plate has a plurality of sprues aligning with a plurality of gate holes. The bottom surface of the stationary molding plate has a plurality of top cavities, communicating with the sprues through their respective gates and each having a wider section provided with a pair of holding projections for holding a toothbrush body preform. The gates are formed at necks of the top cavities respectively. A back up plate is interposed between the stationary mounting plate and the stationary molding plate. A core plate comes into contact with the stationary molding plate at a parting plane. The top surface of the core plate has a plurality of bottom cavities corresponding to the top cavities.

Abstract: The monolith includes a base of plastic resin material having elongated bristles of the same resin material monolithically relatively upstanding on one side thereof so that the monolith can be used as a brush. The base of the monolith is molded in a cavity having branches thereof in which the bristles are formed. The bristles are formed to have shank portions relatively upstanding from the one side of the base to points on the longitudinal axes of the bristles relatively intermediate between the one side of the base and the tips of the bristles, and tip portions extending relatively outwardly along the axes of the bristles from the intermediate points to the tips of the bristles.

Abstract: A mold and injection molding process for the production of a fishing lure having multiple, integral bristles extending vertically from the lure. The mold defines an internal cavity in communication with an injection port and a ventilation port. The internal cavity defines a fishing lure having a desired shape. The cavity contains a pair of porous halves that facilitate the formation of integral bristles. Molten material is injected into the cavity through the injection port while air escapes through the ventilation port. The molten material penetrates the porous insert to form the bristles. The bristles are concurrently and integrally molded with the rest of the lure. After curing, the fishing lure is removed from the mold.

Abstract: A process for permanently attaching smooth finished globules of coating material to the ends of the teeth of molded plastic combs, picks, lifts and the like, including roughening or oxidizing the teeth ends to remove the gloss finish and form a more adherent surface; dipping the roughened teeth ends into a bath of liquid coating material to attach a globule of coating material to each tooth end and cover the sharp mold-parting line located thereat; and drying the globules attached to the teeth ends.

Abstract: A brush head for cleaning and massaging the teeth and gums is disclosed having a bundle of parallel fibers welded together to form a bottom plate. The brush head is produced by continuously feeding the parallel fibers to a heated mandrel, partially melting one end of the fiber bundle to form a bottom plate with a surplus of melted material extending away to form an extended bottom plate. The extended bottom plate is removed, leaving a bottom plate which is sufficiently rigid so as to be directly attachable to a driving device. The welded bottom plate assures that fibers remain firmly attach to prevent fibers from loosening or separating from the brush.

Abstract: Bristle articles can be manufactured in that the bristle carrier and optionally the ends of the bristles are melted and brought together under pressure, or the bristles are introduced into an injection or foaming mould for the bristle carrier and are embedded in the bristle carrier material by injection moulding or foaming. The cycle time of these processes is extremely long as a result of the thermal processes (heating, melting, injection moulding, cooling). It is possible to significantly reduce the same in that the tools for holding or producing the bristle carrier on the one hand and the clamping devices for the bristles on the other are moved on closed paths and the clamping devices at at least one common station are transferred to the path of the tools and at least during the thermal processes are jointly moved with the tools and are subsequently returned to their movement path.

Abstract: A method of forming a brush from a plurality of thermoplastic bristle filaments. The steps of the method include inserting the plurality of thermoplastic bristle filaments into a hollow mold tube, moving a hole former pin into a first end of the bristles, and heating the mold tube adjacent the first end of said bristles to melt the first end of the thermoplastic bristle filaments around the pin. The steps also includes cooling the mold tube, extracting the first end of the filaments out of the mold tube and extracting the pin out of the first end of said bristle filaments, whereby a brush having a hollow brush holder is formed for use.

Abstract: A conveyor-transfer apparatus for transferring artificial Christmas tree piquets (branches) from a first conveyor on which the piquets are parallel to the direction of travel of the conveyor to a second conveyor where they are arranged transverse to the direction of conveyor travel whereby their ends can be tapered. This is accomplished automatically without the use of manual labor.

Abstract: A container closure includes a cap for sealing a container against leakage, and a brush-like pliable member for spreading contents of the container. The cap includes a top wall, an internally threaded skirt depending from perimetrical portions of the top wall, and a stem depending from a central portion of the top wall. The brush includes a paddle-shaped member or a plurality of bristles which depend below the stem for brushing the contents of the container onto a surface. The cap and the brush are formed as a one-piece structure. A method of forming the one-piece cap and brush includes the step of molding the cap using a specially configured mold which has at least three relatively movable parts for defining a mold cavity and for effecting a pop-off type of ejection of the threaded skirt from the mold once the integral cap and brush have been molded.

Abstract: A container closure includes a cap for sealing a container against leakage, and a brush for spreading contents of the container. The cap includes a top wall, an internally threaded skirt depending from perimetrical portions of the top wall, and a stem depending from a central portion of the top wall. The brush includes a plurality of bristles having (1) mounting portions which are secured to the lower end region of the stem, and (2) applicator portions which depend below the stem for brushing the contents of the container onto a surface. The cap is a one-piece structure having its brush-supporting stem formed integrally with other parts of the cap.

Abstract: A method and machine for manufacturing brushes, in which bristle bunches are manufactured before being transported to a brush member, the individual bristles being connected to one another. Bristle bunches which are prepared in this manner are distributed by a distributor block to plural tubular conduits leading to a bristle bunch holder which holds the bristle bunches in a desired orientation relative to the brush member. The bristle bunches and the brush member are welded together by pressing them against one another, both the bristle bunches and the brush member having previously been softened at the welding regions. The tubular conduits can be of any desired length and can be routed in any desired direction to the brush member, which permits the manufacture of all brush shapes.

Abstract: A mold for use in molding paint brush heads comprises a pair of mold forming assemblies adapted to form a mold cavity therebetween. Each of the assemblies comprises an upper segment and a lower segment which are adapted to be retained in an end to end relationship, the lower segment having a length through which a bristle knot can be inserted with ease. A molding machine for use in molding ferruleless paint brush heads is also disclosed in which there is provided the improvement of a mold assembly comprising a first pair of molding belts, each having oppositely disposed forward run portions extending continuously through a bristle loading station and then through at least one molding station. The forward run portions of the first molding belts have dividers extending therebetween which form plurality of mold cavities proportioned to receive the proximal end of a bristle knot therebetween. A second pair of molding belts each having a forward run portion are also provided.

Abstract: The injection molding of brushes, particularly miniature brushes such as for the application of cosmetics, is carried out in a mold in which each of the cavities defining the bristles is defined by a plain surface of one mold piece and a grooved surface of another mold piece. The mold pieces are clamped together and a brush is formed by injection molding. An ejector rod facilitates removal of the molded brush from the mold, thus making it unnecessary to separate the mold pieces to remove the molded brush. However, the mold pieces may be unclamped and separated to allow the mold to be cleaned of foreign matter or broken bristles.

Abstract: Comb having teeth with generally rectangular cross-sections and apparatus for making the same.

Abstract: A finished plastic-handled brush is prepared by a single molding step involving gateless molding of the brush back by a tunnel-gating and novel punch-pin finishing apparatus and process which eliminates the usual gate stud, and removing the finished brush back and securing tufts of bristles in the face of the brush back to complete the brush construction.

Abstract: A finished plastic-handled brush is prepared by a single molding step involving gateless molding of the brush back by a tunnel-gating and novel punch-pin finishing apparatus and process which eliminates the usual gate stud, and removing the finished brush back and securing tufts of bristles in the face of the brush back to complete the brush construction.