Patent GB-669092-A (GB)
Title: Improvements in or relating to mechanisms for feeding strips step-by-step from storage spools
IPC: B21D51/44
Filed: 1949-09-30
Abstract: 669,092. Feeding webs. U.D. ENGINEERING CO., Ltd., and ABBER, R. S. P. Sept. 30, 1949, No. 27750/48. Class 100 (i) A step-by-step strip feeding mechanism, particularly for feeding a metal strip beneath a forming tool for producing bottle caps, is of the kind in which a roller firmly engaging the strip is rotated intermittently and in which a loopforming member is reciprocated or oscillated in timed relationship with the rotation of the roller in a direction transverse to the length of the strip between the roller and a storage spool, so that a loop is formed by rotating the storage spool when the roller is stationary, the loop being taken up by the next rotation of the roller, and is characterized in that movement of the loop-forming member is transmitted in both directions from a reciprocating or oscillatable member through a resilient link, whereby excessive tension in the strip is avoided. A strip of metal foil 81 is fed to a machine for producing bottle caps (not shown) from a supply roll (not shown) between pieces of absorbent material 73 and 80 supplied with lubricant, around a looping roller 56 oscillated about a shaft 60 by a crank 61 through a spring link by a plate 15 provided on a hub 13. The spring link comprises a tubular body part 63 pivotally connected to the crank 61, a head 66 carried by a spindle 67 being slidable in the part 63 against a compression spring 69 positioned between the head 66 and a plug 68. The hub 13 oscillated by a lever 14 is rotatable on a spindle 12 which also carries a freely mounted feed roller 18 having pins 19 which engage perforations, spaced along the edges of the strip 81. A circular plate 24 is fixed on the spindle 12 and is secured to a gear wheel 25 by a clamping screw 28 extending from a threaded hole in the wheel 25 through an arcuate slot in the plate 24, thus permitting angular adjustment between the wheel 25 and plate 24 to effect registration of printed matter on the strip with the cap-forming tool. A drum 31 on the gear wheel 25 is engaged by a pair of adjustably spring-pressed brake shoes 32. A ratchet wheel 17 fixed to the spindle 12 is rotated in an anticlockwise direction by a pawl 16 pivoted on the plate 15, this intermittent rotation of the spindle 12 being transmitted to the roller 18 through teeth 40 on a hub of the wheel 25 which engage similar teeth on a hub of the roller 18. When the arm 14 is rotated in a clockwise direction as shown in Fig. 1, the pawl 16 rides over the ratchet wheel, the feed roller 18 being held stationary by the brake shoes 32 and a further shoe 23 which rests on the strip passing over the roller 18. During this time the looping roller 56 is moved to the left as shown in Fig. 1 to form a loop in the web, excessive tension in the web being prevented by the spring link. During anticlockwise. rotation of the arm 14, the feed roller 18 and wheel 25 are rotated and the roller 56 is moved to the right as shown in Fig. 2 while the web fed from the roller 18 passes to additional spring-pressed rollers 45 and 46 intermittently rotated in synchronism with the roller 18 through the gear wheel 25 and gear wheels 42 and 43. 669,119. Copying documents; printing surfaces. JANKA, ZAVODNY NA VYROBU ZARIZENI VZDUCHOTECHNICKYCH NARODNI PODNIK, and PANUSKA, P. July 16, 1949 [July 17, 1948], No. 18794/49. Class 100 (ii). Apparatus for presenting a mirror-script master sheet to the drum 1 of a manifolding machine, comprises a tiltable desk 4 movable towards the drum 1 from a vertical or substantially vertical position of rest, a fixed abutment 16 below the desk to support the leading end of a master sheet fed through a guideway 11 on the desk, and a clamping member or ledge 12 which is movably mounted on the desk so as to move automatically to clamp the sheet to the desk on tilting of the desk from its position of rest. The ledge 12 is supported in grooves. 13 in the sides of the desk and is urged towards the desk by springs 14, but in the position of rest is held apart from the bearing face 4' of the desk by abutments 15 on the machine frame to allow a sheet to pass freely to lie on the desk. The desk is mounted by means of pivots 5 in bearings 6 fixed on the machine frame and is tilted by means of a lever controlling rotation of the drum 1 and for operating a holding jaw 3 for the master sheet on the drum. The lever operates a pinion 10 to swing a segment 9 which controls the jaw 3 and, through links 8, tilts the desk 4. A vertical portion 16' of the fixed abutment 16 acts as a deflector for printed sheets delivered from the machine.