Stanchions
AssigneeSpringbok Appointments (Proprietary) Limited
InventorPeter Erwin Herr
Life of this patent
Estimating the term…
Abstract
A method and apparatus for manufacturing a stanchion or tube having at least two integral bulbous portions thereon are disclosed. The method involves defining at least two spaced cavities on the outside of a stanchion tube, the inner surfaces of the cavities being shaped to define the outer contours of the integral bulbous portions of the completed stanchion. A predetermined quantity of flowable and substantially incompressible material within the tube between the inner ends of two oppositely directed rods extending into the tube from the ends thereof, to cause the tube to deform in substantial conformity with the inner surface of the cavities. The process is repeated on any other regions having cavities formed on the outside thereof without firstly removing the rods from the tube.
Claims6
A method of manufacturing a stanchion or tube having at least two integral bulbous portions thereon comprising the steps of:
- a. providing at least two spaced fixed split cavities on the outside of a stanchion tube, the inner surfaces of the cavities being shaped to define the outer contours of the integral bulbous portions of the completed stanchion;
- b. applying a compressive force to a predetermined quantity of flowable and substantially incompressible material within the tube between the inner ends of two rods extending into the tube from the ends thereof, and one of which rods passes completely through the region of one of the cavities, this first compression being effected in the region of the other of the cavities to cause the tube to deform into substantial conformity with the inner surface of the said other cavity;
- c. releasing the compressive force between the rod ends;
- d. withdrawing the rod passing completely through the said one cavity such that its end is at least in the region of the end of the said one cavity most remote from the already formed bulbous portion;
- e. moving the other rod into the region of the said one cavity;
- f. applying a compressive force to a predetermined quantity of flowable and substantially incompressible material in the latter region to cause the walls of the tube to deform into substantial conformity with the said one cavity, and
- g. releasing the compressive force on the rods and moving them apart at least sufficiently to enable the tube to be removed therefrom after the split cavities are moved apart to an open position.
Dependencies are inferred from the claim text.