258 METHODS OF GLASS MANUFACTURING. 



the bottle to be blown. It is then transferred to a 

 mould, and the workman blows through the pipe, until 

 the glass is forced against the sides of the mould. By 

 this time the temperature of the glass has reached a 

 point which enables it to retain its shape if handled 

 with care. The bottle is now ready for the final opera- 

 tion, that of finishing the mouth. This may be per- 

 formed in two ways. While the bottle is still in the 

 mould, the workman continues to blow after the bottle 

 has been fully shaped, the result being the formation of 

 a glass globe between the mould and the end of the blow 

 pipe which finally breaks, thus detaching the pipe from 

 the bottle. The bottle is then taken from the mould 

 and placed in a punty, a sheet iron form, attached to 

 which is a handle, which leaves exposed only the 

 shoulder and neck of the bottle. The neck is then re- 

 heated at a glowing furnace until it reaches a molten 

 heat ; it is then fashioned into shape by means of a pair 

 of spring tools, which consist of an iron plug, which 

 enters the mouth of the bottle, and is the exact size of 

 the corkage required, and the jaws which press against 

 the neck of the bottle force the molten glass against 

 the plug inside. The punty is given a rotary motion by 

 the workman, while the tools remain fixed. The result 

 is the formation of any shaped ring or lip desired while 

 the mouth will fit the size of cork intended. 



Another method of accomplishing the same result is 

 to remove the bottle from the mould still attached to 

 the pipe, placing it in the punty, and then detaching 

 the pipe from the bottle by breaking the glass near the 

 end of the pipe. A small amount of molten glass from 

 the furnace is then added to the extremity of the neck 

 of the bottle, and this is then worked into shape with 

 the same kind of tools before described. 



The bottle is now ready to be annealed and should be 

 immediately transferred to the oven or leer. 



