Patent GB-191109661-A (GB)
Title: Improvements in and relating to Mechanism for Forming Receptacles of Paper or similar Material.
Inventor: MAXWELL GEORGE WASHINGTON
Filed: 1911-04-20
Granted: 1912-04-22
Abstract: 9661. Maxwell, G. W. April 20. Paper pipes and tubes.-Machines for forming the rectangular bodies of paper and like receptacles, the blanks employed are, while wrapped round a mandrel, enclosed in a rigid casing, the mandrel being then expanded. A blank 90, Fig. 1, is fed past a pasting-device 103 to one of a series of mandrels 21 mounted on fixed spindles 19 projecting on both sides of radial arms 18 on a wheel or spider 16. Grippers 47 are closed on the blank by a cam-operated dog 93 acting on a trigger 50 on the gripper shaft. The mandrel is then moved into position under a shaft 69 on which is a gear segment 70 provided with a cam-plate 71. A catch 65, Fig. 5, which by engaging a notch 26, normally prevents the mandrel from rotating, is lifted by the cam 71, and the mandrel is rotated through two revolutions by the segment 70 engaging a gearwheel on the mandrel rollers 104, Fig. 6, pressing the blank against the mandrel. The rollers are carried by yokes 106, 107 of different lengths mounted on a shaft 105, and are acted on by springs 116. Immediately the blank has been wound, the grippers 47 are opened by the lever 128 acting on the trigger 50, and a casing 22 is closed around the mandrel. The bottom sections 51<a>, 51<b>, Fig. 10, of the casing are hinged to a guide-stem 63 working in a bracket 64. Guide-stems 134 raise a cross-head 130 until the bottom of the casing seats against the underside of the mandrel, and springs 146, contacting with the lugs 60 on the cover sections 53 fold these sections into position over the mandrel. The section carrying a hook 58 is closed first, and a spring-controlled latch 254 snaps over the hook to secure the casing. As the casing comes up into position, the latch 254 strikes a trip arm 121 carried by the yoke 106, and raises the presser rollers 104 carried by that yoke out of the way, brackets on the yoke 106 acting on the yoke 107 to raise the remaining rollers. As the mandrel travels to its next position, it is expanded to clamp the receptacle body against the casing. The mandrel consists of sections 27, Fig. 10, normally pressed in towards a sleeve 29 by springs 32 acting between the bottoms of recesses 31 and nuts 33 on studs 30 secured to an inner tube 23. The mandrel is expanded by a cam 148 engaging a roller 45, Fig. 9, and so moving the sleeve 29 to bring wedge collars 34 into action. Another cam 151 then enters a notch 152 in a collar 40 and moves it, so that a spreader 37 connected to the collar 40 enters the end of the receptacle body and spreads it to facilitate the insertion of the upper ends after the receptacle has been filled. The casings then pass before a heater, consisting of a curved gas-burner tube 149 with openings 150, and the adhesive is dried. A cam 160 afterwards acts on the rollers 45 to retract the wedge sleeve 29. The spreader 37 is simultaneously withdrawn by a pin on the wedge sleeve acting against the end of a slot in the sleeve 40. A cam-piece 155 then unfastens the latch 254, and the casings open, leaving the receptacle accessible for withdrawal. The wheel 16 is intermittently rotated by means of an arm 72, Fig. 3, actuated by a cam 75. A trip 76 on the cam lifts a hooked link 77 out of engagement with the end of a mandrel spindle 19, and the arm 72 is then rocked to the left until the link engages the next spindle. The arm is then returned. The wheel is locked between Each movement by pawls 82, 83 engaging a rib 80 on the arms 18, a cam lifting the pawl 83 when the wheel is to be advanced. The casings 22 are shown as provided with the guides 153 for the crimpers that arc employed if the bottoms of the receptacles are to be inserted.