Apparatus for positioning a pair of elements into aligned intima

Details Apparatus for positioning a pair of elements into aligned intima Apparatus for positioning a pair of elements into aligned intima

1976-05-27

1978-08-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356172, G01N 2130

Patent

active

041091582

ABSTRACT:
A continuous flexible web includes a flat flexible insulation substrate, copper cladding on at least one major surface of the substrate and a film of photoresist material adhesively bonded longitudinally to the copper cladding. Prepunched holes are formed in and through the web to ultimately provide through-hole connections between printed circuits formed on opposite sides of the substrate.
Successive sections of the web are indexed through an apparatus where the sections are positioned adjacent to a circuit pattern master and exposed to resist-developing ultraviolet rays. A photocell system cooperates with through-slots formed selectively in the web to precisely align the web sections with the circuit pattern master prior to exposure to the ultraviolet rays.

REFERENCES:
patent: 3843916 (1974-10-01), Trotel et al.
patent: 3890508 (1975-06-01), Sharp
patent: 3955072 (1976-05-01), Johannsmeier et al.

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