Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – Plastic band
Patent
1997-11-26
1999-03-09
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
Plastic band
24 20CW, 24 20TT, 24271, 24279, B65D 6300
Patent
active
058784659
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a flexible tubular envelope consisting of a web-shaped sheath with longitudinally extending closing members and being provided with longitudinally extending bellows-like folded portions between these closing members.
Such a tubular envelope is known from DE 195 19 849 C1. Such tubular envelopes serve to wrap elongate objects or bundles of objects, for example cable harnesses, pipes or other elements that have to be kept together, e.g. for holding together a pipe sheath of insulating material. This known tubular envelope comprises bellows-like folded portions that allow for a certain circumferential extension of the envelope. For example, bends in the course of the tube require a certain extensibility of the envelope, whereas the wrapped material is to be enclosed tightly in straight sections.
It is an object of the invention to provide a flexible tubular envelope with longitudinally extending bellows-like folded portions which has an improved deformation behavior.
The object is solved, according to the invention, with the features of claim 1.
In the tubular envelope of the present invention, the folded portions are in the form of rounded waves. This is advantageous in that the web-like sheath is extensible in the transverse direction, the folded portions being able to completely regain their shape after tension is applied. With zigzag-like folded portions, as are provided in the tubular envelope of DE 195 19 849 C1, the overall structure of the web-like sheath becomes rigid. The zig-zag folded portions form ridges that do not regain their shape even when strong tensile forces are applied, so the they rather affect the rigidity of the sheath than increase its extensibility, in particular when bent. Due to the change in the cross section of the material related to the zigzag shape and going together with an embossing effect, there is a risk of brittleness under cold conditions.
In contrast thereto, the web-like sheath of the present tubular envelope only has an undulated contour with the wall thickness being maintained, there being no substantial change in the shape of the material cross section. This has the effect that the sheath as a whole is relatively soft and can be placed around objects of different dimensions while snugly enclosing the wrapped object on the outside. This may even mean that the rounded waves are entirely straightened out. When the enclosed object is thinner, however, the rounded waves that tend to contract will remain, the object being enclosed with a certain tension.
The invention is based on the fact that a web-like sheath with formed portions in the shape of rounded waves always has a certain elasticity in the transverse direction (or the circumferential direction), while being soft enough to easily adapt to different diameters of the enclosed material and allowing for a local extension necessary at bends.
Preferably, the formed portions are designed such that the material thickness in the direction of a normal to a tangent line provided to the web in the area of an undulation, is the same in all places. That means that the web of material has a constant thickness and that merely its overall shape has the contour of a corrugated sheet metal.
Preferably, the height of the undulations is more than twice the thickness of the web, and more preferably more than four times the thickness of the web.
A further aspect of such tubular envelopes is the closing of the longitudinally extending closing members. These closing members have their engaging faces formed in the manner of an "arrow and channel" configuration, whereas their averted faces are in the form of trapezoidal grooves into which corresponding pressing tools are inserted.
According to the invention, the grooves provided on the closing members for closing are formed with groove flanks that extend substantially parallel or (even) converge towards the outside. Thus, a much better guiding of the closing tools is guaranteed without there being a risk of the tools slipping out laterally from the grooves.
The fo
REFERENCES:
patent: 931706 (1909-08-01), Stevens
patent: 1349789 (1920-08-01), Schirra
patent: 2440260 (1948-04-01), Gall
patent: 3189961 (1965-06-01), Heller
patent: 3517702 (1970-06-01), Mueller et al.
patent: 4402113 (1983-09-01), Smith
patent: 4609171 (1986-09-01), Matsui
patent: 5216783 (1993-06-01), Calmettes et al.
Sakran Victor N.
Zipper-Technik GmbH
LandOfFree
Flexible cladding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flexible cladding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible cladding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1310126