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US 5,365,813 AGranted
System for making picture frames
AssigneeProduction Plus Corporation
InventorThomas F. Greene
Life of this patent
Estimating the term…
Abstract
A system for forming picture frames which comprises first and second punching stations to form miters and notches in the picture frames. The punching stations are aligned along the same axis and the picture frame is fed linearly through the punches. Sets of drive rollers are controlled to move the picture frame through the punching stations in stepped sequence to form finished picture frames.
Claims6
A method for the formation of a picture frame having planar and curvilinear surfaces which comprises:
- moving the picture frame forwardly to a first punching station;
- punching the picture frame through the surfaces to form a leading miter;
- moving the picture frame rearwardly to a second punching station upstream from the first punching station;
- punching a first notch in the picture frame;
- repositioning the picture frame at the second punching station;
- punching a second notch in the picture frame;
- repositioning the picture frame at the first punching station;
- and
- punching a trailing miter in the picture frame to form a finished picture frame.
6 more elements
Dependencies are inferred from the claim text.