Patent GB-602997-A (GB)
Title: Improvements in or relating to adhesive-applying devices
IPC: B65B51/02
Filed: 1945-11-15
Abstract: <PICT:0602997/III/1> <PICT:0602997/III/2> <PICT:0602997/III/3> <PICT:0602997/III/4> An adhesive-applying device for use in an automatic machine having a duct through which adhesive is fed direct to an adhesion surface is so arranged that a portion of the duct accommodates a movable (e.g. slidable) member having a passageway formed therein so as to permit passage of adhesive through the duct when said passageway is in communication with the duct, the arrangement being such that on movement of the member to bring its passageway out of communication with the duct, the passage of adhesive through the duct is cut off.  The automatic machine may be fitted with means integral with or coupled to the movable member which when actuated by a part of the machine causes the movable member to open or close the passage or to open and close it alternately. Referring to Fig. 1, a narrow cylindrical duct 4 has an extension 7 at one end forming a discharge nozzle and an extension 8 at the other end for attachment to an adhesive supplying pipe 9. slidable member 11, whose ends project from the apparatus, has an annular groove 12 which can be positioned either in alignment with the duct 4 thus allowing adhesive to flow to nozzle 7, or out of alignment thus preventing such flow.  In Figs. 2 to 4, a body 15 having a nozzle 16 and sliding member 17 is fixed to a pin 18 surrounded by torsion spring 22 and pivoted in fixed bearings 19 and 20.  Articles 23 are moved by pushers 24 on spindle 25 with conveyer chains 26.  Cam 27 engages lever 28 splined to pin 18 so that as pusher 24 leaves adhesive applying station cam 27 engages lever 28 thus rotating pin 18 moving the body 15 away from the pusher path hence causing the fixed cams 29 to move member 17 and so stop the flow of adhesive, after which torsion spring 22 returns body 15 to the adhesive applying station.  A detecting device for missing articles is also shown in Figs. 2 and 4.  A driven cam 33 is so timed that its depression 42 engages lever 32 whenever an article should arrive at the adhesive applying station.  If the article is present, feeler 30 is supported by it and adhesive supplied.  If, however, an article is not present, spring 32 lowers feeler 30 rotating rod 31 and causing it to move axially since spiral groove 35 engages screw 36.  Thus the groove 37 aligns itself with lever 28 and prevents torsion spring 22 returning body 15 to the operative position.  Then cam 33 continues its rotation releasing lever 32 from depression 42 thus rotating rod 31 which again moves axially carrying with it lever 28 thus constricting spring 38.  The following cam 27 trips lever 28 out of groove 37 when spring 38 returns lever 28 to its operative position and spring 22 brings body 15 back to the adhesive applying station.  Mechanism to cut off the supply of adhesive when the machine stops is also shown in Figs. 2 and 4. When the machine is in operation flywheel 43 rotates freely on the main shaft 39 of the machine with roller 8 in contact with its largest diameter.  When the machine stops, the flywheel 43 by reason of its inertia continues to rotate moving along spiral groove 45 engaged with pin 46 (moving to the left in Fig. 4) so causing roller 48 to move under action of spring 49 into the flywheel's smallest diameter, while links 50 and 51 pull body 15 away from the operative position.