Patent GB-462080-A (GB)
Title: Improvements in or relating to machines for cutting off the insertions for sanitary towels and enclosing them in tubular fabric
IPC: A61F13/15
Filed: 1936-03-03
Abstract: 462,080. Catamenial appliances; cutting-machines; step-by-step conveyers; feeding webs. DRESSEN, W. March 3, 1936, No. 6404. [Class 81 (ii)] [Also in Groups VIII and XXX] In a machine for cutting-off insertions of cellular material for sanitary towels and enclosing them in a tubular fabric, wherein the cutting appliance consists of a rotating circular knife and of lateral knives for rounding the corners of the insertions, a hollow shaft 32, Fig. 1, disposed below a table 5 drives the feeding device, periodically raises a ram which holds fast the web of cellular material, drives a crank arm carrying the knife disc in a circle and moves the lateral knives in a circle, the rotating of the knife disc being effected by a shaft which extends through the hollow shaft. The cellular material 8 is drawn from supply roll 7 by a feeding device consisting of an indiarubber sheet 11 stretched over rollers 9, 10 and tensioned by roller 12. A ratchet wheel 13 mounted on roller 9 is fed forward step-wise by pawl 14 actuated by a rod 15 attached to a crank pin on a cam disc 17. This is driven with the associated screw wheel 35 by means of a screw wheel 34 mounted on the hollow shaft 32. After an insertion 1 has been cut from the web 8 by the rotating knife disc 19, the ram 20 is raised by the cam disc 17 actuating the rod- and-lever mechanism 26, 27, 28, 29 whereby the web may be moved forward. The ram is slidable by means of eyes 21 on rods 22. The shaft 30 of the knife disc 19 is mounted on a crank 31 attached to the hollow shaft 32. The knife disc is'rotated by motor 40 acting through a pulley 39, shaft 41 and pulleys 42, 44. Alternatively, the shaft 41 may be driven by tooth wheel transmission from the shaft of one of the wheels 37. On each side of the machine a triangular cutter 48 is disposed in a stirrup 47, being mounted on the shaft of a tooth wheel 49, driven via wheel 37 by a toothed wheel 36. At each working stroke of the machine, a triangular or similarly shaped piece is cut from the web, so that the corners of each insertion are cut obliquely. The stirrups may be rocked outwards about their axes 51, so that insertions are produced having square corners. At the same time, the wheels 37, 49 are disengaged. The severed insertions pass to the conveyer track 4 and thence to the device wherein they are enclosed in the tubular fabric. In Fig. 4, the conveyer consists of an endless chain 71 provided with suitably spaced tappets 72. In Fig. 3, an oscillatable carriage 55 slides on a rail 54. A lever 61 is pivoted on an upwardly directed part of the carriage and bears with friction on the rail 54 so that it lags behind the carriage in its movements, which are restricted relative to the carriage by a pin 63. A wire arm 65 is secured to the lever 61, and to it is pivoted an arm 66, the ends of which carry rubber buffers 67, 68. As the carriage 55 moves to the left, the lever 61, lagging behind, first presses the arm 65 and the rubber buffers 67, 68 onto the insertions 1 and then pushes them towards the wrapping machine. On the return stroke of the carriage, the lever 61, lagging in the other direction, lifts the buffers 67, 68 off the insertions. The insertions pass from either type of conveyer into a carrier 2 for the tubular fabric 3. As shown in Figs. 5 and 6, two carriers are provided, so that one may be charged while fabric is being drawn off the other. Each consists of four rods 74 75, 76, 77, of which rods 74, 75 are secured to a carriage 79 slidable on track 78. The rods are connected by links 80, 81. When fabric from a roller 83 is to be drawn on by a roller 84, the carrier is collapsed, and a frame 82 attached thereto. Each roller consists of a disc 86 mounted on a shaft 85 and carrying rotatable rods 87. Each rod is provided with a row of needles 88, and is formed with a notch 89. A spring 90 tends to rotate the rods so that the needles lie inside the disc 86. A non-rotatable eccentric disc 92 mounted within the roller engages with the notch in the uppermost rod and so rotates it that its row of needles projects. Accordingly, each row of needles engages with the fabric for a short time only, and then retracts behind the periphery of the roller 84. Tearing of the fabric is thereby obviated. The tubular fabric and insertions are drawn off the carrier 2 by rollers 95, 96, 97, Fig. 8, being braked by brushes 94. Knives 98 located on the roller 95 coact with a knife 102 mounted on a carrier 101 attached to a toothed wheel 100 meshing with wheel 99. The fabric is cut midway between two insertions and is held stationary on roller 95 by two spring-pressed flaps 103, 104. A stationary cam 106 disposed inside the roller 95 coacts with extensions 108 of the flaps 103, 104, and is so shaped that the lower flap 104 releases the severed end of the tubular fabric when in the position shown in Fig. 8. As the completed sanitary towel drops into a receptacle formed by rods 110, the lower severed end is bent upwards by plate 112. As the upper end of the insertion reaches the roller 96, plate 112 is moved to the left under the action of an eccentric 116 on a roller 117 on the bars 111, and so stacks the articles in the receptacle. As the flap 103 releases the upper end of the tubular fabric, flap 120 is pressed down under the action of a cam disc 123 acting through levers 121, 122, and so presses the upper end of the tubular fabric against the insertion. The wrapping machine is connected by a chain 33<1> to a chain wheel 33 on the shaft 32 of the cutting machine, Figs. 1, 4.