Patent GB-743344-A (GB)
Title: Mechanism for surfacing articles of felt or other material
IPC: B24B35/00
Filed: 1953-03-16
Abstract: 743,344. Hat-pouncing machines. CASSE. M. March 16, 1953 [Nov. 7, 1952], No, 7157/53, Class 63. [Also in Group XXIII] A machine for surfacing felt hats comprises a support A, Fig. 1, which is provided with a detachable abrasive member 18 having such a size that its available working surface is much greater than its area of contact with the hat and given a high-frequency low-amplitude reciprocatory movement for the surfacing action and a slow rotary movement for renewing the portion of the abrasive surface in contact with the hat. The support A, consisting of two side plates 12, 13 and a rim 14 held together by bolts, is driven by two oppositely driven and counterbalanced crank pins C<1>, C<2> so that each point on its surface moves in a substantially elliptical path H, Fig. 6, having a minor axis equal to twice the eccentricity of the pins and a major axis greater than the minor axis in the ratio OG<1>/OC<1>. The crank pins are rotated by bevel gears 39, 40, 40a from a shaft 37 driven by a belt 34 from a motor 27 mounted for pivotal adjustment about a horizontal axis in the frame 4. In addition to this movement, which may have a frequency of 3500 cps., a slow rotary movement, e.g. one rotation in two hours, is imparted to the support A by a worm drive 59 driven through reduction gearing and a pulley 36 from the belt 34. The worm drive can be disengaged by a screw adjustment to enable the support A to be freely rotated for replacement of the abrasive member 18 which is in the form of a strip with its two free ends passed through a diametrical slot in a tightening key mounted in the support A. The frame 4 is provided with a removable panel 7 and resiliently mounted on a support 2. In a second embodiment for sanding a hat brim two supports A<1>, A<2>, Fig. 8, are provided each of which receives a high-frequency oscillatory movement from a sun wheel 106 on an epicyclic gear and a slow rotary movement from a toothed ring 110. The wheels 106 are connected in anti-phase to a crankshaft (not shown) belt driven by a pivotally mounted electric motor 88 which also drives the toothed rings 110 through a belt 85, a vertical shaft 126 and worm gearing. To enable the hat brim to be inserted between the supports, the upper support A<1> is mounted on a slide 101 connected by a rod 130 and links 132 to 134 to a pedal 136. A counterweight mounted on a bar 138 may be adjusted to increase or reduce the effective weight of the slide 101. The hat is supported by a former D<1> connected through an anti-vibration support 93 to a mechanism similar to an oval turning lathe. This mechanism is driven through worm gearing 80 from a shaft 81 and is connected by links 75, 76 to a manually-operable lever 78 for movement towards and away from the supports A<1>, A<2>. A roller 142 mounted on the rod 130 to co-operate with a cam surface 141 on a link 140 connected to the link 75 may be provided to move the hat support automatically with the slide 101. A forced lubrication system including a gear pump 143, a pipe 148 and a branch pipe to the crankshaft is also provided. The machine is automatically stopped after a predetermined number of revolutions have been made by the hat. The member 18 may be replaced by a band of cloth or felt that is dry, greasy or soaked in coloured or softening powders or by shark skin. Reference has been directed by the Comptroller to Specification 692,832.