Cap for protecting pipe ends, and a cutout blank for making the

Details Cap for protecting pipe ends, and a cutout blank for making the Cap for protecting pipe ends, and a cutout blank for making the

1987-07-23

1988-10-18

Thronson, Mark J.

Pipes and tubular conduits

End protectors

Threaded

F16L 5700

Patent

active

047779853

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a cap intended to be placed over the ends of pipes and of similar tubular bodies, and particularly but not exclusively of cast iron pipes, for the purpose of protecting said ends during handling and transport of such bodies.
Caps of protective end fittings are already known for pipes or for similar articles, they are made of card or composite material comprising superposed layers of card and plastic material.
For example, British patent specification GB-A-537 287 describes a protective wrapping for coils of electric wires, which wrapping includes a central strip intended to be closed over the outer cylindrical face of a coil of electric wires. Trapezium-shaped tongues extend away from both longitudinal edges of said central strip and taper away from the central strip. These tongues are intended to be folded down over a respective one of the plane side faces and over the inside cylindrical face of the coil. Tongues from opposite sides overlap one another on the inside cylindrical face and they are provided with a layer of adhesive over their end portions in order to ensure that they remain in this position.
French patent specification FR-A-856 245 describes a similar wrapping for the same purpose but in which the tongues are rectangular in shape and the central strip has transverse fold lines extending the notches between the tongues. In use, the closed central strip is in the form of successive plane faces; the tongues are folded down only over the plane side faces of the coil of wires and they overlap one another partially. A sheet of paper or card is glued over the folded down tongues in order to hold them in position.
Caps made in accordance with these documents are not suitable for protecting the end portions of pipes.
French patent specification FR-A-2 208 378 describes a pipe-end-protecting cap having a cylindrical skirt for protecting the outer side face of the pipe, an inwardly directed flange for protecting the end of the pipe, and inwardly sloping lips for protecting the inner face of the pipe. However, the free end portions of these inclined lips are separated by cutout slots.
Caps made in accordance with this design do not have a protective portion which properly covers the inner face of the pipe; each such cap is suitable only for a single size of pipe or for a narrow range of pipe sizes, and such caps occupy considerably volume.
The main aim of the invention is to provide a cap or protective end fitting for the ends of tubular bodies, in particular pipes, where the inner faces of such bodies are properly covered, at all times, by a protective layer. A secondary aim of the invention is to provide a cap capable of being stored flat and suitable for tubular bodies of very different sizes, while ensuring proper protection of the outer surface, of the end surface, and of the inner surface of the end portions of tubular bodies under all circumstances.
Another aim of the invention is to provide a cap of the above-defined type in which the folded down tongues remain in place without using an adhesive.
The invention also relates to a flat cutout blank for obtaining such a cap.
In a protective cap comprising s skirt terminated on a side edge by a fold groove, a strip folded through 90.degree. towards the inside of said skirt and connected to said side edge, tongues folded into a position parallel with said skirt and inside said skirt, connected at one end to said strip and separated from one another by cutout slots, according to the invention the cutout slots extend across said strip dividing it into lengths of strip and reach the fold groove running along the skirt, and said cutout slots extend, at least at their end portions close to the free edges of the tongues, in a general direction which is at an angle relative to said free edge, thus giving rise to a point on one of the sides of each tongue.
Thus, when in use, each point engages the adjacent edge of the adjacent tongue.
Preferably, each cutout slot follows a curved line having a convex edge on one tongue and a concave e

REFERENCES:
patent: 440168 (1890-11-01), Kurtz
patent: 1498563 (1924-06-01), Morrison et al.
patent: 2708453 (1955-05-01), Das
patent: 2828904 (1958-04-01), Mires et al.
patent: 3018883 (1962-01-01), Wohlforth
patent: 3314586 (1967-04-01), Frank
patent: 4630646 (1986-12-01), Koehle

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