Patent GB-405324-A (GB)
Title: Improvements in sealing tumblers, jars, cans and like containers
IPC: H01K3/02
Filed: 1932-08-03
Abstract: 405,324. Sealing jars &c. WHITE CAP CO., 1812, North Central Avenue, Chicago, U.S.A. Aug. 3, 1932, No. 21818. Convention date, Oct. 12, 1931. [Class 125 (ii).] Apparatus for sealing tumblers, jars, &c. comprises a receiver provided with openings at opposite sides and having movable closures for closing said openings to confine tumblers, &c. therein, means for moving the closures to open and closed positions, a plurality of trays movable into and out of the receiver and each adapted to hold a plurality of tumblers, &c., and means disposed outside the receiver and operating periodically in timed relationship with said closures for propelling the trays successively into the receiver through one of said openings and out of it through the other. The invention is described as being applied to sealing tumblers, &c., under vacuum. As shown, a box-like receiver 11, fixedly mounted on a frame 10, has its ends closed by padded doors 20, which are raised to the dotted line positions by vertically reciprocable slide bars 26, one on each side of the receiver, which are connected to the doors by thrust links 27 and pivoted arms 21. The slide bars 26 carry rollers 51 which ride upon cams 50 fixed to a rotating shaft 36, whereby the bars 26 and doors 20 are lifted. The doors may be kept in the raised position by a pin fitted in a slide bar guide. Aligned with the receiver is a trackway 14 having guides 15, along which trays 60 containing tumblers &c. are advanced by a slide 17 reciprocable on rods 16 synchronously with the slide bars 26. This slide carries pivoted pawls 18 spring-urged so that their noses normally project above the track 14 whereby they engage behind a tray, and is connected, by a lever 45 and rods 47, 41, to a link 39 pivoted at 40 and carrying a roller 38 which rides in cam slot 37 in a pinion 35 fixed to the shaft 36. The sealing mechanism comprises a platen 85 fitted with a plurality of spaced cushioned anvils 106 and carried by four vertically adjustable posts 82 held in a member 81 from which depend four thrust links 88 connected in pairs by pins 89, 89<1>. These links 88 are connected by links 92, 96, to a yoke member 87 fixed to a shaft 86 journalled in an extension 12 of the receiver side wall. This shaft is connected by an arm 97 to a sleeve 98 carried on a rod 99 connected to a lever 101 pivoted at 102 and carrying a roller 104 which rides in a slot cam 105 carried on the shaft 36. Thus when the rod 99 rises the platen 85 rises, and vice versa, the platen being given a dwell above the loosely applied friction lids. During this dwell a valve 122, operated by links 127 from a cam 126 fixed to the shaft 36, is moved so as to exhaust air from the receiver, the doors being closed. When the air is exhausted the platen descends and forces the lids on to the tumblers &c. and then the valve 122 is shifted to the relief position. Trays are delivered on to the trackway 14 by a belt conveyer 52, being first deposited on the slightly raised part 14a and pushed therefrom by following trays. Means for controlling this advancing movement comprise a lever 64 pivoted at 62 at one side of the trackway, its free end being engaged by a roller 65 on the door 20 when the latter rises. A stop member 68 connected to lever 64 and normally held in the trackway by a spring 69 is thus raised and the pawls 18 push the tray into the receiver. While the door is raised a stop member 72 connected to lever 64 by linkwork &c. 77, 78, 79, 71, prevents motion of the following trays.