Patent GB-786474-A (GB)
Title: Apparatus for compacting and tying bundles
Inventor: SAXTON JAMES BLANE
IPC: B65B27/08
Filed: 1956-03-01
Abstract: 786,474. Bundling-machines: baling-presses. NATIONAL BUNDLE TYER CO. March 1, 1956, No. 6508/56. Class 94(1). A machine for compressing and tying bundles of bags, rags, cartons &c. comprises means to feed a bundle beneath a press and delay means to set into operation tying means only after a given period of compressing. The machine consists of two substantially identical halves, the spacing between which may be varied to suit differing lengths of bundles, joined by a common feeding means 31, 32 travelling along rails 37, 39 to feed the bundle beneath compresser heads 73. The feeding means is traversed by a constantly moving chain 45, the raising of a handle 44 on the means 31, 33 causing a dog 43 to engage between the chain links. When the bundle is beneath the heads 73, one of the chain sprockets 48 pushes the dog 43 clear so that the feeding means may be returned by a chain 58, one end of which is secured to the feeding means and the other to the machine frame, the chain 58 passing round a pivoted weighted arm 63. At the advanced position of the feeding means, a member 64 thereon engages a valve 65 to cause air to be admitted to cylinders 67, Fig. 9 (not shown), causing the heads 73 to commence their compressing stroke. As the heads 73 descend, a member 81, Figs. 3, 10, on each of the two halves of the machine, which is attached to a frame element moving with the respective heads beneath the tables 20, 21, causes a lever 85 to pivot in a horizontal plane so that an arm 86 displaces a lever 93 permitting clutch elements 97, 98 to engage. The clutch enables a constantly driven shaft 51a to drive a chain 102 carrying a pin 107. While the pin 107 is carried round almost the whole of the chain's circuit, the bundle is being compressed, this constituting the required delay before tying. Towards the end of the circuit, the pin 107 displaces a cam 108 and rod 109 permitting a pawl 111 to engage means driving the respective tying arm 24 or 25. This means consists of a constantly driven sprocket 113 which is coupled by the pawl 111 to a crank 117. the crank drawing down a chain 121 against the pull of a return spring 123 and thus oscillating a sprocket 122, to which the tying arm is attached, through a half revolution and back. Return of the rod 109 then causes disengagement of the pawl. The tying mechanism is conventional and is not shown. As the pin 107 strikes the cam 108, a further pin 101 on the chain 102 engages a cam surface on the lever 93, earlier returned to its initial position by a spring 96, and breaks the clutch drive to stop the chain 102. While tying is in progress, an element 127, Fig. 10, on the shaft 118 carrying the sprocket 113 operates a valve 128 to reverse the air flow to the respective cylinder and cause the particular head 73 to be raised. Means is provided to cause the chain 45 to disengage from its driving sprocket 50 in the event of undue resistance to forward progress of a bundle, such resistance releasing and swinging clockwise about the axis of the sprocket 48, an arm carrying a tensioning sprocket 49.