Patent GB-789173-A (GB)
Title: Improvements in or relating to sealing apparatus for container lids
Inventor: HEAD PETER
IPC: B65B7/28
Filed: 1955-01-18
Abstract: 789,173. Apparatus for applying adhesive tape. ADHESIVE TAPES, Ltd. March 20, 1956 [Jan. 18, 1955], No. 1474/55. Class 73 A machine for applying adhesive tape 12 from a reel 10, Figs. 1 and 2, to seal a container (not shown) rotatably clamped by a bearing member 6 on to a rotary table 7 has a swinging arm 15, Fig. 3 that can be swung resiliently against the container and which carries tape applying means together with a knife 33 that is cocked in a retracted position whilst taping proceeds, and is released to cut the tape 12 between the container and the tape applying means after the arm has swung away from the container. The machine has a hollow base 1 which houses pneumatic equipment (described later) and supports a pillar 2 on which a casting 4 can be adjusted vertically to suit the various, heights of containers to be taped. The casting 4 supports the tape reel 10 on a fixed arm 8 and has a bearing in which a sleeve 15 carrying the arm 13 can rotate horizontally. Figs. 3 and 5 show the arm 13, which comprises an extension piece 20 of the sleeve 15 to which is. fixed a dished arm 21 with a cover plate 22 attached. The arm carries tape guide rollers 23 and 25, a tape applying roller 24 arid, below the plate 22, a knife lever 31-35 which has a serrated knife 33 and a flexible wiper 34. The roller 25 contacts the sticky side ot the tape and is fitted with a one way clutch (not shown) so that the unwinding resistance of the tape reel 10 does not draw the end of the tape off the taping roller 24 as the arm 13 swings outwards. A push rod 42 in the arm 13 is arranged so that, when the arm is swung right back away from the table 7, one end of the rod bears against a fixed stop (not shown) on the casting 4 and cocks the knife 33 against the bias of the knife spring by pushing on the lever 31-35. The knife is retained in the cocked position by a stop 40 on a spring loaded arm which bears against the lever 31-35. Also pivoted below the plate 22 is a probe lever 48 that carries a roller 50 which is pushed into a retractor position simultaneously with the contact of the taping roller 24 on the contained to be taped. Pushing back the roller 50 frees the knife lever 31-35 from the stop 40, but does not free the knife 33, as the projection 52 on the probe lever continues to engage the face 35A on the knife lever. After the container being taped has revolved rather more than 360 degrees the table 7 stops rotating and the arm 13 retracts so that the taping roller 24 is disengaged and frees the probe roller 50. The probe roller then moves out, releasing the arm 31-35 and freeing the knife, which flies out to cut the tape. One end of the cut tape is wiped on to the container by the wiper 34, the other is retained on the roller 24 by the finger 29 ready for the next taping cycle. The knife is recocked by the retraction of the arm 13. as previously described. The layout of the pneumatic equipment which works the.machine is illustrated in Fig. 15 (not shown). It comprises pneumatic rams 5, 70 and 67 which operate respectively the bearing member 6, a rack 71 which revolves the rotary table 7, and the swinging arm 13. The rams are connected with a series of valves, restrictors and the like, which cause the rams to function in the required sequence when the button 81 is pushed. A silencer 88 is also provided for the pneumatic system.