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. 06, 1984
Filed:
Jun. 27, 1983
William D Beam, Richmond, VA (US);
David C Chrisman, Sandston, VA (US);
Lloyd R Cox, Richmond, VA (US);
Charles R Hankins, Sandston, VA (US);
AT&T Technologies, Inc., New York, NY (US);
Abstract
An article support rack (10) has at least one article support (12), such as a shelf, which is horizontally slidable in a first frame (18). A second frame (29) is mounted for vertical movement relative to the first frame (18). At least one weight (26) is supported by such second frame (29) at a certain distance above the article support (12) when the first and second frame are in a first position relative to each other. Articles (24) such as circuit boards are placed on the article support (12), and the vertical position of the first and second frames are shifted to a second position relative to each other wherein the upper surface of the circuit boards is pushed against the respective weight to lift the weight off its support such that the weight rests on the circuit boards. In a treating chamber (22), for example a bake oven, pedestals retain the first and second frames in such second position, such that the weights rest on the circuit boards (24) during a drying process to prevent the circuit boards from becoming warped. The absence of similar pedestals outside the bake oven causes the two frames to shift back to the first position relative to each other when the support rack (10) is removed from the oven to remove the weights from the circuit boards and allow them to be unloaded from the rack.