Lamp glass envelope and method for manufacture a lamp glass enve

Details Lamp glass envelope and method for manufacture a lamp glass enve Lamp glass envelope and method for manufacture a lamp glass enve

1984-10-22

1986-02-18

Kellogg, Arthur

Glass manufacturing

Processes

Forming product or preform from molten glass

65 81, 65185, 65262, C03B 912

Patent

active

045712522

ABSTRACT:
A method for producing the type lamp glass envelope used in a reflector lamp is disclosed which employs a ribbon machine. Said ribbon formed lamp glass envelope includes a cylindrical neck portion terminating at one end in a curved reflector portion closed by an integral flattened face portion of lesser curvature with light distributing elements being formed on the exterior surface of said face portion. In its preferred embodiments, the reflector portion of said lamp glass envelope is of the PAR type which can further include truncation of the parabolic shape with opposing substantially flattened parallel surfaces as well as face portions for said lamp glass envelope which can be circular or rectangular in shape. A novel mold construction permitting said lamp glass envelope to be blown on a ribbon machine includes a pair of cooperating halves to form the sides of the curved glass envelope in a central cavity and which terminate at the ends of said cavity in a separate curved or flat base part which undergoes reciprocal motion in a vertical direction during said manufacturing process.

REFERENCES:
patent: 3071946 (1963-01-01), Watson et al.
patent: 3252782 (1966-05-01), Moreau
patent: 3372826 (1968-03-01), Heaton
patent: 3519408 (1970-07-01), Russell
patent: 3694178 (1972-09-01), Henniquin
patent: 3716136 (1973-02-01), Birner et al.
patent: 3729301 (1973-04-01), Heaton et al.
patent: 3729302 (1973-04-01), Heaton

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