Patent GB-713907-A (GB)
Title: Means for joining together superimposed webs of sheet material
IPC: B65H37/04
Filed: 1952-07-24
Abstract: 713,907. Joining webs for book signatures. TIMSONS, Ltd., and DICKINSON, C. H. July 9, 1953 [July 24, 1952], No. 18776/52. Class- 16 [Also in Group VIII] Mechanism for joining together travelling webs of paper or like sheet material comprises a receptacle for a liquid adhesive, means for picking up adhesive from the receptacle and applying it in the form of spaced transverse lines or bars to one surface of a guided travelling single web and means for feeding and pressing on to that web another travelling web whereby'the webs become stuck together transversely at spaced intervals therealong; The adhesive applying member comprises a straight blade 1 of brass, rubber or other suitable material set in and attached to the outer ends of a pair of rotary arms 2, 3 rigidly secured to the end portions of a spindle 4 mounted in bearings 5 in spaced side frame castings 6, the blade 1 having its outer edge proud of the carrier arms 2, 3. The blade 1 and arms 2, 3 are counterweighted by an extension 2a of the arm 2 and are adapted to be continuously driven, as from an associated printing machine, through gearing including a spur gear 7 (not shown) secured to the spindle 4 adjacent the arm 2. An adhesive transfer roller 8 is rotatably mounted in a trough 9 for the adhesive by means of trunnions 8a in bearings in the end plate 9a, one end extension of the trunnion 8a having a spur gear (10, not shown) which can be arranged to mesh with spur gear 7 so that the roller 8 is positively driven in the reverse direction to the blade 1. The trough 9 is mounted, so as to be removable for replenishment and cleanning, by means of front and rear bars 18, 21 having reduced end portions 19, 22 for engagement respectively with inclined slots 20 and vertical slots 23 formed in side bars 11 supported from the side frames 6, the trough 9 being locked in position by wing nuts 24 on the screw-threaded ends 22. The side bars 11 are supported for slight pivotal movement for adjusting the position of the roller 8 with respect to the blade 1, by means of levers 13, to which the bars 11 are secured by screws 12, each lever 13 being pivoted on a fulcrum pin 14 set in the side frame 6 and having at its upper end a slot 15 into which extends a pin 16 fixed to the side frame 6, the position of the pin 16 being fixed by adjustable screws 17. A scraper 26 is secured to a bar 25 mounted between the end plates 9a of the trough 9 to control the thickness of the adhesive coating. The travelling web W, printed as required, is guided by a series of rotatable guide rollers, the rollers 27, 28 guiding a portion W<SP>1</SP> upwardly in a line tangential to the path P of the blade 1, the web W<SP>1</SP> being pressed against the blade 1 by a roller 33 adjustably mounted on spaced arms 32 depending from the spindle 31 carrying the guide roller 28. The web W then passes under a further guide roller 29 and the second web W<SP>2</SP> is fed over a guide roller 34 on to the adhesive coated web W<SP>1</SP>, the two webs then passing between gripper rolls. 30 to secure the two webs along the transverse lines of coating. The combined webs are then passed through draw rolls and a rotary cutter device. The cutter device may sever the webs either midway between the lines of adhesion or adjacent to or through the lines to provide .pairs of signatures joined in the middle or at one or both ends, in readiness for folding or interfolding in both sections. More than two webs may be joined similarly, there being an additional adhesive applying device for each additional web. To reduce the spacing between the lines of adhesive, more than one adhesive applying blade may be arranged to rotate in the same path P and co-operate with the same transfer roller 8.