Woodworking – Shaping machine – Grooving machine
Patent
1985-08-12
1987-06-16
Bray, W. D.
Woodworking
Shaping machine
Grooving machine
144 3R, 409158, 409162, 409209, 409218, B27C 500
Patent
active
046730117
ABSTRACT:
A staircase stringer fabricating apparatus includes a structural machine frame having a carriage moveably mounted with respect to the frame for supporting an elongated stringer work piece. A track mounted upon the structural frame defines a guide for the carriage so that the carriage can move on a controlled path with respect to the frame. Material working stations, such as wood routers, welding torches or the like are spaced upon the machine frame for simultaneously preparing the work piece with selectively spaced apart tread assembly positions that define the horizontal stair step positions (including the spacing and angular positions) upon the stringer during use. The tread positions are preferably formed responsive to the movement of the carriage and work piece upon the track along the controlled path so that the work stations traverse the work piece. In the preferred embodiment, the wood routers simultaneously make cuts with equal separation in the wooden stringer work piece to which individual treads can be affixed.
REFERENCES:
patent: 769931 (1904-09-01), Baghurst
patent: 1352196 (1920-09-01), Hunter
patent: 1808962 (1931-06-01), Mackay
patent: 2168234 (1939-08-01), Onsurd
patent: 2745449 (1956-05-01), Pearson
Greve Christopher G.
Lapeyre James M.
Bray W. D.
The Laitram Corporation
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