GB486364A - Brush and method and apparatus for making same - Google Patents

Abstract

486,364. Brush - making apparatus. JACKSON, L. MELLERSH-. (Toledo Automatic Brush Machine Co.) July 5, 1937, No. 18649. [Class 19] [Also in Group XXII] Brush bristles 13, Fig. 16, are set in a stock 23 and held by metal anchors E<1> sheared from a continuous flat strip E, Fig. 1, laterally into a feeding nozzle A out of alignment of a driver D and pushed during shearing into the path of the driver. The strip E, which has a rounded edge so as not to cut the bristles, is fed by rollers actuated intermittently by a ratchet wheel G and pawl H on a bell-crank I again operated by a slide J, bell-crank K and cam L. A shaft M operates the cam L, driver D and nozzle A. The plane of the feed of the strip E, Fig. 7, is slightly offset from a channel C, and a shearing member O is located with its cutting edge in the horizontal plane at the bottom of the channel C. A co-operating movable shearing member P normally spaced from the member O for strip feed is subsequently moved to shear an anchor E<1> from the strip E and move it into the plane of the channel C into the path of the driver D. The member P forms one wall of the channel C and with the corresponding wall Q guides the anchor. When advanced by the driver, the anchor passes between plates C<1>, C<2>, which have grooved edges for engaging and guiding opposite ends of the anchor and holding it in alignment with the driver. The notching of the anchors is done by a pair of shear members R, R<1>, Fig. 1. The shear member R, Fig. 4, is a V-shaped grooved disc and has a cut-away segment for shearing corresponding with a similar cut-away segment in the member R<1>. The member R may be clamped in position, but the member R<1> is mounted on a rock-shaft S<1> intermittently operated by an arm S<2> extending laterally into a recess T in a housing T<1> forming the guide for the nozzle A. During the movement of this nozzle the arm S<2> will be rocked to shear notches from the strip E. The strip is firmly held against longitudinal movement at which time an anchor is sheared by the member P, Fig. 2, which is pivoted at P<2> and operated by cams P<3>, P<4>. All the parts are timed so that the shearing of the anchor from the strip and the movement into the path of the driver is slightly in advance of contact of the anchor and driver and subsequent to the feeding bristles through a slot B, Fig. 1, into registration with the channel C. The completion of the drive will spread the prongs of the anchor as shown in Fig. 16. The mechanism is stated to be capable of high speed due to positive feed and accurate guiding. Small anchors only are necessary requiring narrow brush backs and there is saving of material such as celluloid in the manufacture of toothbrushes.