Patent GB-466575-A (GB)
Title: Improvements in or relating to forming machines for glass bottles, jars and the like
IPC: C03B9/18
Filed: 1935-11-30
Abstract: 466,575. Glass manufacture. PEARSON, T. F. Nov. 30, 1935, No. 33249. [Class 56.] Relates to a machine for forming bottles, jars, and like hollow glassware in which a number of mould units rotate about a central vertical axis, the path of the parison moulds being coaxial with, but differing from, the path of the blow or finishing moulds. According to the invention, parisons are transferred from the parison mould of each unit to the blow mould by a hollow transfer slide, movable radially, which carries a blow head and the ring mould from one mould to the other and also forms a conduit for supplying blowing air to the blow mould. The moulds are carried by a table 10, Fig. 2, which rotates continuously about a central hollow column 13. The blow moulds 15 are situated at a greater distance from the column 13 than the parison moulds 18, and are opened and closed as described in Specification 466,117. The parison moulds 18, which are opened and closed as described in Specification 464,930, are supported by drums 19 that rotate periodically to invert and reinvert the moulds. A hollow plunger 35 arranged beneath each parison mould, and constructed and operated as described in Specification 467,452, supplies suction and compression to the ring mould 67 when the parison mould is inverted to receive a charge of molten glass. The charges of glass are directed into the parison moulds by a guide funnel 73, and a baffle plate is applied, in the manner described in Specification 463,547. A series of transfer arms 49 rotate with the table, and each arm is caused to slide radially above a mould unit by a fixed cam 58. The arm is hollow and is connected by a telescoping pipe 51 with a distributer that controls the supply of compressed air for blowing the parisons to their finished shape. The arm carries at its outer end a hollow head 56 having in its upper part a valve 59 to provide communication between the pipe 51 and the head. The valve is opened by a cam 61 the contour of which can be adjusted, as described in Specification 467,350, in order that the opening of the valve 59 may be altered as required. The hollow head 56 is open at the sides and has opposed gib pieces 63, Fig. 4; adapted to be engaged by the upper edge 64 of a blow head 65 which is pivoted on the hinge pin 69 of the ring mould 67. The blowhead 65 carries a resiliently-mounted neck-forming plunger 85, which is constructed as described in Specification 464,929. In operation, after a finished article has been discharged from a blow mould, the ring mould is closed and is carried inwards by the movement of the transfer arm 49 from the position shown on the left of Fig. 2 to a position over the parison mould 18. The parison mould then closes and grips the ring mould, and the inversion of the parison mould swings the blowhead 65 out of the hollow head 56 downwards to the position shown in the right of Fig. 2, where the neck-forming plunger 75 is in contact with the hollow plunger 35. The transfer arm 49 then moves inwards again in order to allow the inverted parison mould to be charged with glass. After charging, the parison mould is reinverted, and the blowhead 65 again enters the hollow head 56 and is transferred, with the ring mould and a suspended parison, to the blow mould.