Filter leaf

Details Filter leaf Filter leaf

1982-11-22

1984-05-01

Albritton, C. L.

Electric heating

Metal heating

By arc

210488, 219121EC, B23K 2700

Patent

active

044463529

ABSTRACT:
A filter leaf includes a continuous, elongated closure member, a first screen welded around its entire periphery to one side of the member, and a second screen welded around its entire periphery to the other side of the member to define a filtrate collection space between the two screens and the member. Means are provided for removing filtrate from the collection space. The filter leaf is made by clamping the closure member and one of the screens between two plates so the screen covers one side of the member and so the outer portions of the member and screen project outwardly from one of the plates. The outwardly projecting portions of the screen and member are irradiated with a laser beam to melt the screen and member to cause them to fuse together. The periphery of the outwardly projecting portions of the member and screen are moved relative to the laser beam while the member and screen are clamped together to form a continuous weld of the screen to the member around the entire periphery of the screen. The foregoing process is then repeated with a screen on the opposite side of the member so that an enclosed filtrate space is formed between the two screens and the interior wall of the member.

REFERENCES:
patent: 3679062 (1972-07-01), Burkhart
patent: 3949186 (1976-04-01), Nakayama et al.
patent: 4000392 (1976-12-01), Banas et al.
patent: 4152573 (1979-05-01), Saurin et al.

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