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:
Jun. 30, 1981
Filed:
Dec. 26, 1979
George A Gillespie, Coon Rapids, MN (US);
UOP Inc., Des Plaines, IL (US);
Abstract
Screen for use in collecting and/or distributing process flow streams has profiled surface wires welded to channel-shaped support members and is preferably made by helically wrapping and welding a profiled surface wire around the elongated channel members which are rotated about the screen axis to produce a cylindrical slotted screen which is then cut along a line parallel to its axis, flattened, and either used flat or rerolled and welded at right angles to its original direction so that the channels form hoop-like supports. The channels are preferably apertured to such an extent that the total open area for an inlet stream flow on the channel side of the screen is less than the open area of the slots on the wire side of the screen. Also, it should be noted that the outer edge of each leg portion of each of the channel members is positioned so close to the outer edge of a leg portion of an adjacent channel member that substantially all of the process stream will flow through the aperatures. Thus, the pressure drop through the screen is controlled by the apertures in the channels with the result that the screen surface can be provided with slot widths of optimum size relative to the particle size of material to be contacted thereby.