| 摘要 |
<p>1,203,525. Perforating elastomeric articles. ALUMINUM CO. OF AMERICA. 22 April, 1969 [26 April, 1968], No. 20611/69. Heading B5A. A method of piercing holes in elastomeric articles of predetermined shape includes placing articles in a predetermined orientation and then moving them into and out of a predetermined position with respect to a laser, and upon moving each article into such position actuating the laser to produce a laser beam firing through said position to pierce a hole at a desired location in the article. Bottle nipples are fed from a vibrating hopper to a device 12, Fig. 2, which locates each nipple 72 in an individual support 16 mounted on a continuous, intermittently driven chain, which feeds the nipples in their supports to a piercing head 20. The latter comprises a gas-tight compartment 31 into which a laser beam 34 is directed when a nipple is correctly located and orientated in its support; photo-electric means 58, 60 sense improper orientations to prevent operation of the laser. The beam is divided by an optical wedge 32 into three beams 36, 38, 40 directed on to the nipple to provide vent holes 68, 70 in the nipple base and a feed hole 72. Beam detectors 62, 64, 66 operate to stop the apparatus if the centre beam and at least one of the side ones are not received by them, i.e. indicating whether the desired holes have been pierced. The perforated nipples on their supports are fed to a means such as an air jet which ejects them into a delivery shoot or conveyer. An improperly seated nipple is not perforated or removed from its support and is recirculated.</p> |
