Metal deforming – With cutting – By composite tool
Reexamination Certificate
2002-02-22
2003-11-04
Crane, Daniel C. (Department: 3725)
Metal deforming
With cutting
By composite tool
C083S054000, C083S191000, C083S917000
Reexamination Certificate
active
06640602
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to notching equipment, and more specifically to a device that is capable of forming two notches in a hollow workpiece in the same action.
BACKGROUND OF THE INVENTION
Polyvinyl tubing is commonly used for many purposes, including by way of example rather than limitation, fencing, decking, lawn furniture etc. In such applications, it is often required that the polyvinyl tubing be processed in one or more ways. For example, in many applications notches must be formed into two or more of the sidewalls in order to permit an end portion of one piece of tubing to be inserted and securely locked in a receiving aperture in another piece of tubing. In an application such as polyvinyl fence systems, for example, the notched end of one tubular polyvinyl fence rail is inserted into a receiving aperture in a tubular polyvinyl fence post, thereby forming an easy to assemble joint.
The processing of such components often requires the polyvinyl tubing to go through several repetitions in a notching die to create a single complete section of tubing. In such a process, the workpiece (e.g. a piece of hollow polyvinyl tubing or some other tubing material) is aligned and inserted into the notching die. The die is cycled to create a notch on a first surface, and then the workpiece is removed from the die and reoriented. The reoriented workpiece is again inserted into the die to create another notch on a second surface. This process is repeated until the desired number and location of notches is achieved.
In order to improve processing efficiencies it may be desirable to create multiple notches in a single action.
REFERENCES:
patent: 1679572 (1928-08-01), Hayden
patent: 1895589 (1933-01-01), Spatta
patent: 3270604 (1966-09-01), Waltonen
patent: 4205545 (1980-06-01), Andrews
patent: 4334703 (1982-06-01), Arthur et al.
patent: 4621553 (1986-11-01), Gruchalski et al.
patent: 947194 (1974-05-01), None
patent: 919788 (1982-04-01), None
Crane Daniel C.
Marshall & Gerstein & Borun LLP
SSD Control Technology Inc.
LandOfFree
Dual notcher does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual notcher, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual notcher will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3141730