Patent GB-450769-A (GB)
Title: Apparatus for applying closure caps to jars and like vessels
IPC: B67B3/24
Filed: 1935-01-23
Abstract: 450,769. Sealing jars &c. WHITE CAP CO., 1812, North Central Avenue, Chicago, U.S.A. Jan. 23, 1935, No. 2282. Convention date, Aug. 27, 1934. [Class 125 (ii)] An apparatus for applying closure caps to jars, cans, &c., comprises feeding means for moving a jar to and from a sealing device which seats the cap on the jar and a capapplying device which presents a cap for engagement by the jar as it moves to the sealing device and withholds a cap from engagement by the jar as the latter moves from the sealing device. As shown, the caps are disposed in an adjustable shoot 17, Figs. 1 and 2, on the cap-applying device 16 which is hinged to the top of the sealing chamber 12 and forms a cover therefor ; the caps are retained in the shoot by a spring detent and a weighted cap-levelling device 19 is pivoted on the device 16 to swing on a horizontal axis. The sealing device comprises a head 22 carried by a plunger 21 which is reciprocated vertically in the chamber 12 from a pedal 38 which is coupled to a vertical rod 26 slidable in a standard 11 and connected to the plunger by a lever 29 pivoted in a bracket 28 on the standard ; the lever 29 is also pivoted to a sleeve 30 disposed slidably on the plunger between an adjustable nut 32 and a spring 34, and adjusting nut 31. Rollers 54, 55 on the device 16 are engaged by the offset portion 52 of a rod 51 hinged to a crank arm 50 slidably mounted on a square shaft 49 which also carries a second crank arm 56 hinged to a rod 57 projecting rearwards with its other bent end 57a lying in the path of a pair of lugs 68, 59 on the slidable feed table 40. The chamber 12 is open at the side through which the table 40 passes and is supplied with hot vapour passing from a pipe 66 through ports 65 in the device 16. The jar 11 to be sealed is placed against positioning members 42 on the table 40,. and is held thereon by stops 46 at the end of a slide 44 pressed forwardly by a spring 47 and held frictionally on the table 40 by pins 40<a>, 40<b> detachably engaged with the table. The table is moved by a handle 41 to carry the jar into the chamber 12, the hot vapour therein heating the open mouth of the jar and the lowermost cap in the shoot 17 and the cap being withdrawn from the retaining detent as the jar contacts with the cap which rests on the rim of the jar and is carried forward by the jar under the device 19 and to the head 22 which is then moved downwards to seat and seal the cap on the jar ; fluid supplied to the head 22 cools the cap and the vapour in the upper portion of the jar and, at the end of the forward movement of the table, the lug 58 contacts with the rod 57 and moves it so that the shaft 49 is rotated to draw the rod 52 forwards and pivot the device 16 upwards clear of the sealed jar as it is withdrawn from the chamber. As the tube 40 is moved rearwards the lug 59 engages the rod 57 and the device 16 is lowered to its original position. The parts may be operated automatically and the head 22 may be provided with a spring- controlled valve in its lower face, the stem of the valve being thrust upwards against the action of the spring as it engages the cap and opening the valve to allow the cooling fluid in the head to flow through intersecting channels in its lower face over the cap and jar. Specification 312,148, [Class 125 (iii)], is referred to.