Patent GB-428643-A (GB)
Title: An improved machine for cutting off short lengths of flexible material, and creasing and folding the same
IPC: B31D1/00
Filed: 1934-03-27
Abstract: 428,643. Cutting, creasing, and folding strip material; feeding webs; delivery apparatus. RAPKIN, G. C., and RAPKIN, F. G., 151, Goswell Road, Clerkenwell, and SQUIRE, F. A., Queen's Works, Leswin Place, Stoke Newington, both in London. March 27, 1934, No. 9527. [Classes 100 (i) and 100 (ii)] [See also Group VIII] In a machine for cutting off short lengths of flexible material such as paper, fabric, or metal, and creasing and folding the lengths transversely, and specially applicable to the preparation of mounts for fixing postage stamps in albums, the material. which is fed intermittently, passes over a fixed shear and beneath a cutter bar and a creaser bar that are connected together, the cutter bar severs the material just prior to the action of the creaser bar, and the latter operates to press the material into an intermittently driven endless band that is supported beneath it and is made of soft material such as rubber. The machine preferably accommodates a plurality of webs 53, Fig. 5, which are carried by reels 19, Fig. 2, mounted on a common shaft 18 and are fed over a guide 115 into a loop 116 in side-by-side relationship by rollers 52, 54, the former of which is driven from the main driving-shaft 16; as many pressure rollers 54 are provided as there are reels 19, and each is independently adjustable by operating a screw 58 which controls the spring 57, engaging each pivoted roller-supporting arm 55. The roller 52 is of rubber, and the effect of increasing the pressure of the rollers 54 is to decrease its rate of feed. The web is withdrawn from the loop 116 over a guide 117 by an intermittently-rotated grooved roller 59 having adjustably mounted co-operating pressure rollers 60, each of which presses a web into a groove in the roller 59. Short lengths are severed from the webs by a knife 37 co-operating with a fixed shear 65, and the severed lengths are fed forward by a roller, or a row of small rollers 66, co-operating with an endless intermittently-driven rubber band 67 to a creaser bar 36, which together with a fixed supporting bar 70 serves to crease the strips. The roller 59 and the band 67 are intermittently operated by gearing from a ratchet which is rotated by a pawl carried on an arm, which is oscillated by an eccentric. A similar arm and eccentric raises and lowers one end of the creaser bar 36 and knife 37, which are connected and the other ends of which are pivotally mounted. To ensure a sudden cessation of movement of the feed-roller 59, a spring latch 89 is provided which normally engages projections 88 on a disc 87 fixed to the roller shaft, the latch being raised when necessary by a cam. To prevent rebound, a spring stop 93 is arranged in the path of the projections 88. The blank is folded on the crease and delivered down a shoot 94 to an envelope 24 or other receptacle by a continuously moving band 80 and a co-operating pressure roller 47, kept clean by a strip of felt 86. Means is provided to give warning when a given number of stamp mounts or the like has been nearly completed, and other means for indicating exactly when the required number has been produced. From the drive shaft 16, there is driven a disc 112 having a contact strip 113 which is adapted in its rotation to close contacts which complete circuits, firstly to sound an alarm bell 22 to indicate that the required number has been nearly attained, and secondly to light a lamp 21 when the exact number is reached. By closing a switch in a parallel circuit other contacts may be included so that the alarms operate twice as often.