Method of forming a vial blowback cavity

Details Method of forming a vial blowback cavity Method of forming a vial blowback cavity

1981-07-06

1983-05-31

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65296, 65297, 65298, C03B 2309

Patent

active

043859194

ABSTRACT:
A method of forming a blowback cavity in a vial or similar cylindrical article comprises the steps of providing a cylindrical glass preform having a necked region and first forming an open blowback cavity adjacent the necked region and a relatively thin axially projecting terminal lip on the adjacent end of the preform and subsequently turning the terminal lip inwardly to form a radially extending face defining a mouth opening having a diameter smaller than the diameter of the blowback cavity.

REFERENCES:
patent: 3202495 (1965-08-01), Zauner
patent: 3257186 (1966-06-01), Zauner
patent: 3360352 (1967-12-01), Sundstrom et al.

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