Patent GB-802907-A (GB)
Title: Device for the delivery of strips of any desired length within a predetermined range and of predetermined lengths within said range from a supply roll
IPC: B65H35/00
Filed: 1955-01-19
Abstract: 802,907. Tape dispensers. KIND, E. [trading as METO-GESELLSCHAFT KIND & SOHNE]. Jan. 19, 1955 [March 5, 1954], No. 1682/55. Class 18. A power operated tape dispenser has means whereby two different set lengths of tape may be dispensed, or alternatively a predetermined maximum length or arbitrary lengths less than this. Tape passes from its reel over a continuously driven conveying roller against which it is pressed by a further roller (all not shown) during dispensing. The presser roller is attached to the right hand end as shown of an arm 21, the left-hand end of which carries a severing knife (not shown). The arm 21 is pivoted at 22 and carries a shaft 20 along which is slideable a roller 26. The roller 26 may be brought into the path of one or other of two cams 13 (one only shown) spaced circumferentially according to tape lengths required, and also spaced axially on a control disc 10. The disc 10 is rotated anti-clockwise (as shown), against the action of a spring (not shown) by a constantly rotating pinion 6 being brought into engagement with an internal gear 9 on the disc, the pinion 6 being mounted on a bell-crank lever 8. In the non-delivering position, the end of the arm 21 bearing the knife is held down against the action of a spring 25 by a pawl 217. When it is desired to deliver one or other of the lengths predetermined by the position of the cams 13, a handle 213 is moved to rotate a shaft 211, the broad end 214 of which pivots a lever 29 to shift the roller 26 into the path of one or other cam 13 as required. Rotation of the shaft 211 causes outward pivoting of the pawl 217 to release the arm 21 so that its knife end is pulled upwards. Its roller end, the roller of which then presses on the tape to commence delivery, carries a pin 206 which pushes down the arm 203 of an over-centre device. A slot 202 in the arm 203 is in engagement with one end of the bellcrank 8 and the downward movement causes the pinion 6 to rotate the disc 10 until the particular cam 13 contacts the roller 26 to raise the arm 21 and stop delivery. Raising of the arm 21 also returns the arm 203 and disengages the drive of the disc 10 which returns to its initial position under the action of its spring. The knife cuts the tape and the pawl 217 re-engages the arm 21. If tape portions of the maximum predetermined lentgh or abitrary lengths less than this are required, the handle 213 is used to push the shaft 211 axially inwards when a cam 215 engages the lever 29 to cause the roller 26 to be positioned clear of both cams 13. The axial movement also shifts the pawl 217 to release the arm 21, movement of which, as before, initiates delivery and causes the disc 10 to be driven. It also causes a lever system 233, 234, Fig. 4, to bring a pin 230 on a pawl 231 which is pivoted on the lever 233, into the path of a projection 229, this projection being carried on a member 225 which follows the axial movement of the shaft 211. When the shaft 211 is released and allowed to withdraw, the projection 229 presses the pawl 231 into engagement with the gear 9 causing pivoting of the lever 233 by movement of disc 10 and thus raising of the roller end of the arm 21 by the lever 234. This stops delivery, releases the disc 10 and causes cutting of the strip as before. If the shaft 211 is held in its inner position, a pin 235 on the disc 10 engages the lever 233, after the maximum tape length has been delivered, and stops the mechanism as before. Reference has been directed by the Comptroller to Specification 740,494.