Patent GB-334893-A (GB)
Abstract: 334,893. Craig, J. F. N. June 10, 1929. Folding and shaping paper. - Automatic machines for making folded paper or card articles, particularly finger-loop parcel-carriers such as are described in Specification 271,625, [Class 133, Trunks &c.], comprise folding and cutting-mechanisms and in some cases an eyeleting-mechanism, and the mechanisms may be driven by free-wheel sprockets engaging a reciprocating chain, the free-wheels being so arranged that some of the sprockets are operated on forward movement of the chain, and the others are operated on return movement of the chain. Figs. 2 and 3 show a machine for making fingerloop parcel-carriers consisting of a loop of paper or other material having the ends secured together by an eyelet. A strip 12 is fed intermittently over a table 21 by rollers 62 and during the feed movement is folded once longitudinally by a guide 13, printed on by a roller 14, and folded thrice longitudinally by dies 16, 17, 18. When the strip is stationary it is perforated by two punches 116 and is folded transversely by a member 118 to form the loop, and thereafter a bar 22 inserts an eyelet in the perforations in the two plies, the eyelet is spread by a plunger 25, the strip is cut by a guillotine 31, and the completed loop is ejected by a member 34. The guillotine cuts the strip between two perforations formed during previous cycles of the machine. The guide 13 has a flat entrance 7d, a semicylindrical body 7<e>, and a flat exit 7f. The die 16 is cylindrical, the die 17 is approximately cylindrical and is shaped to overlay the edges of the strip, and the die 18 has a cylindrical entrance merging into a flat exit. The printing-wheel 14 co-operates with an inking-roller 35 and a felt roller 15. The punches 116 are secured to a head 117 carried by a plunger 39 having a guide 38 co-operating with an eccentric on a shaft 66. The folding-member 118 consists of an arm secured to a rock-shaft 19 geared to a rocking segment operated by a cam 85 on a shaft 70. The bar 22 carries a spring-pin 53 and is depressed by a spring 44 and raised by a roller 42 which is carrier by discs 43 on the shaft 70 and cooperates with a shoulder 143 on the bar. The plunger 25 is secured to a pivoted spring-supported arm 26 on the arm 118 and is operated by a projection 29 on a reciprocating head 24 carrying the guillotine 31. Eyelets 51 are supplied automatically from a magazine 55, Fig. 3, to a shoot 54, and the pin 53 inserts an eyelet in the perforations and is then pushed downwards by the plunger 25. The magazine and shoot are mounted on pins 56 and are reciprocated by a rod 59 and crank 58, the arrangement causing the shoot to move out of the path of the bar 22 and pin 53. The head 24 is carried by a plunger 45 having a cross-head 49 which rests on springs 50 and carries rollers 48 co-operating with cams on the discs 43. The member 34 consists of a loop-engaging finger on a rocking arm 32 connected to another rocking arm operated by the cam 85. A driving-chain 60 passes over sprocket 63, 65, 69, 67 having free-wheel engagement with the above-mentioned shafts 66, 70, and the shafts 64, 68 of the printing-roller and the lower feedroller, the free-wheels of the sprockets 63, 67 being of opposite hand to those of the sprockets 65, 69. The chain is reciprocated by means of a rocking sprocket 72 geared to a pinion 74 which is connected by a rod 77 to a crank on a pinion 80 geared to a driving-shaft 78. To prevent the mechanisms from becoming out of phase by over-running of the free-wheels on reversal of the drive, the free-wheels are preferably of the type comprising a pawl co-operating with a single tooth.