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US 3,940,629 AGranted
Device for closing and opening vacuum x-ray film holders
OwnerAndreas Schmitzerinventor
Life of this patent
Estimating the term…
Abstract
A device for closing and opening X-ray film holders is provided with a pressure plate and a flexible partition separating the device into a main compartment and an auxiliary compartment. Each of said compartments is provided with means allowing the particular compartment to be evacuated and to be exposed to air under atmospheric pressure, irrespective of the condition of vacuum and/or pressure prevailing in the other of said compartments.
Claims5
A device for closing and opening vacuum film holders for X-ray films including
- a. means defining a chamber for receiving vacuum film holders for X-ray films;
- b. a pressure plate arranged inside said chamber and operable from the outside thereof selectively exerting pressure upon, and relieving pressure from, vacuum film holders inside said chamber;
- c. flexible partition means having inner ends integral with said pressure plate and having outer ends integral with said chamber-defining means subdividing said chamber into a main compartment and into an auxiliary compartment being tightly separated from each other to preclude any significant flow of air from one compartment to the other;
- d. first passageway means for selectively evacuating said main compartment and for admitting air at atmospheric pressure to said main compartment;
- and
- e. second passageway means for selectively evacuating said auxiliary compartment and for admitting air at atmospheric pressure to said auxiliary compartment.
3 more elements
Dependencies are inferred from the claim text.