The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1979
Filed:
Sep. 01, 1977
AGFA-Gevaert, A.G., Leverkusen, DE;
Abstract
An ionography imaging chamber wherein the sections of the pressure vessel carry concentric spherical electrodes centered at the source of X-rays and defining a spherical interelectrode gap. A dielectric receptor sheet is converted into a portion of a hollow cylinder during introduction into the gap and its marginal portions are thereupon biased against one of the sections by an inflatable gasket which seals the gap from the surrounding atmosphere prior to admission of compressed high Z gas. The admitted gas deforms the sheet against the electrode which is nearer to the source of X-rays while the gas at the rear side of the sheet is allowed to escape by way of ports in the respective section. If the gap receives two sheets at a time, the admission of high Z gas takes place between the sheets so that each sheet overlies and closely follows the outline of the corresponding electrode. The two sheets may constitute discrete sheets or overlapping portions of a single sheet which is trained over a roller at a locus remote from the point of introduction of the sheet into the pressure vessel. Simultaneous exposure of both sheets to object-modulated X-rays results in the making of positive and negative latent images of the object.