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:
Aug. 13, 1991
Filed:
Sep. 12, 1988
Senju Metal Industry Co., Ltd., Tokyo, JP;
Abstract
A tunnel-type reflow furnace containing a preliminary heating zone and a main heating zone is disclosed. In the furnace, at least two pairs of infrared heaters are disposed on both the top and bottom of a tunnel providing a pathway for the transfer of an article to be heated, and the infrared heaters are of a gas blowing type. In a preferred embodiment, a gas-blowing nozzle that is freely adjustable in the direction of gas blowing is provided between infrared heaters on both the top and bottom of the tunnel. This furnace allows the heating profile to be easily changed in accordance with a specific use. It is also capable of efficient and uniform heating of a printed circuit board even if it carries many components at high density. As a result, the furnace ensures reliable soldering of the circuit board.