| 摘要 |
593,192. Wrapping-machines. NEWTON, E. P. (Bronander, W. B.). Dec. 12; 1944, No. 24930. [Class 94 (i)] In a wrapping-machine feeding and cutting means are provided for forming the wrapper and attaching to it a tear strip 25 which is made so as to extend at 76, Fig. 9, beyond the wrapper to facilitate opening of the wrapper. As shown at Fig. 1 the tear strip 25 is fed from a roll T through a guide 26 to feed rollers 27, 28 one of which has a gap 29. The strip passes over a heating bar 32 before and after passing a wick 36 supplied with adhesive from a reservoir 37. The wrapper band 45 passes from a roll W to rollers 46, 47 which coact to form an H-shaped cut and form two flaps 51, 52 in the web as shown in Fig. 9, the strip 25 being secured across the vertical slit and being arranged parallel to the horizontal slits. The join is effected by rolls 55, 57, and roll 55 is formed with a pocket 56 into which the strip 25 and flaps 51, 52 are forced by a stud 65 on roll 57 forming a loop in the tear strip as indicated in Fig. 5. A knife 66 on a further roll 67 which coacts with roll 55 severs the tear strip at the rear end of the loop to form the extension 76. The united strip 25 and web 45 are then fed by rolls 70, 71 to a fixed cutting- blade 73 with which coacts a rotary blade 72, formed with a gap 75, Fig. 4, not shown, which straddles the tear strip 25 and flaps 51, 52. The complete wrapper is wrapped in known manner around the articles 22 supplied by a conveyer 2a. Specification 472,388 is referred to. |
