GB703487A - Improvements in or relating to means for applying adhesive - Google Patents

Abstract

An adhesive applying device comprises a guard member arranged for contacting the article to which adhesive is to be applied, and having in the surface which contacts the article a small recess defining, with the article, an adhesive receiving chamber confined against escape of adhesive between the guard and the article, valve means being provided to permit feeding of adhesive into the chamber. As applied to an apparatus for applying adhesive to the interior of bottle caps, the guard member consists of a ring 10 having a central aperture forming a seating for a small poppet valve 12, the lower surface of the ring being recessed to form a chamber 13. The ring 10 is screwed into a tube 18 which has a part 21 of larger diameter which is threaded and screwed on to the lower end of a tubular pot 22 containing adhesive. A spider 24 in the lower end of the pot carries a bearing 25 for a plunger 26, the upper end of which passes loosely through a hole in a rod 28, attached to vertically reciprocable portion 29 of a machine, and carries a nut 30 above, and a nut 31 and spring 32 below the rod. The lower end of the plunger is adapted to pass, with a sliding fit, through an aperture in a plate 35. The pot 22 is loosely surrounded by a projection 47 carried by the reciprocable member 29, an abutment 49 being fixed to the pot 22 above the projection 47 and a spring 48 being interposed between the latter and the part 21. In operation, the device is brought down upon a cap 15 by movement of the member 29, the guard ring 10 contacting the end wall of the cap. Further downward movement of the member 29 compresses the springs 32 and 48 and causes the <PICT:0703487/III/1> <PICT:0703487/III/2> lower end of the plunger 26 to enter the aperture in the plate 35, creating a pressure in the adhesive below it, which causes the valve 12 to be lifted, permitting adhesive to flow into the space defined by the guard ring 10 and cap 15.