Method and machine structure for finger jointing of lumber

Details Method and machine structure for finger jointing of lumber Method and machine structure for finger jointing of lumber

1978-12-07

1981-02-03

Bray, W. Donald

Woodworking

Special-work machine

Combined

118DIG9, 118 35, 118 59, 144 91, 144198R, 144309L, 144314B, 156258, 1563045, 156557, B27F 116

Patent

active

042482801

ABSTRACT:
Method and means, including a trim saw structure, for assembling finger jointing lumber by an impression finger joining process wherein the ends of two pieces of lumber are placed in spaced apart position and held securely by clamps. A movable section of the machine trims and shapes the ends of the lumber into fingers which are then engaged by a hot die for further impression forming and heating of the fingers. The die moves out of position and a movable applicator applies glue to the outer half of the matching ends of the lumber. The ends are then pressed together and the joined pieces of lumber are advanced away from the work station. The process is a continuous such that incoming random lengths of lumber are joined to form a continuous outgoing length of lumber for cutting into desired lengths. One or more lines of lumber may be advanced through the finger jointing work station during a machine cycle.

REFERENCES:
patent: 2770272 (1956-11-01), Morrison
patent: 3126308 (1964-04-01), Brockerman et al.
patent: 3179135 (1965-04-01), Windsor
patent: 3262723 (1966-07-01), Strickler
patent: 3527274 (1970-09-01), Kramer et al.
patent: 3602275 (1971-08-01), Nissen
patent: 3802986 (1974-04-01), Forsythe
patent: 3844320 (1974-10-01), Dimter
patent: 4128119 (1978-12-01), Maier
patent: 4130150 (1978-12-01), Cook et al.

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