BRIEF DESCRIPTION OF THE DRAWINGS
Additional features of the invention are discernible from the following description of an exemplary embodiment according to the invention in connection with the claims as well as the drawing. The individual features can each be implemented individually or several of them combined in one embodiment according to the invention.
Shown are:
FIG. 1 is a perspective view of a tube with a web woven around it with an adhesive tape being provided in the area of the intended cutting site for sizing the tube section,
FIG. 2 is a view of the tube of FIG. 1, with the cutting site being fixed with the help of a section of an adhesive tape covering the cutting site, tightly wrapping the tube cover and holding it with its adhering layer non-displaceably on the tube cover,
FIG. 3 is a perspective view of another tube separated with the help of a rotating circular knife provided into a sized tube section and the remaining tube material,
FIG. 4 is a view of the end of the tube section secured by the adhesive tape serving as a tube fixation, with the sliding on of a pot-shaped clamping sheath onto the tube end being indicated, and
FIG. 5 a view of the tube section sized from the tube shown in FIGS. 1 through 3 with the clamping sheath slid onto its tube end.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 a tube is shown, which has an inner tube and an outer tube 3 wrapping the inner tube 2. In FIG. 1 it is indicated that the tube cover 3 is here embodied as a metal web, with its threads (so-called monofiles) being woven around the tube 1. The tube 1 can be stored as bulk stock on a tube drum (so-called coil), for example. From this tube stock the necessary tube sections are to be cut individually.
In order to size the tube stock a tube fixation 4 is provided, which can be cut, here embodied as an adhesive tape. This tube fixation 4 is wrapped around the tube cover 3 such that the tube fixation 4 covers the intended cutting site and tightly contacts the tube cover 3.
In FIG. 2, the adhesive tape serving as the tube fixation 4 is fixed with its adhesive layer on the tube cover 3. Here, the adhesive tape 4 is at least wrapped once entirely around the tube 1. The adhesive tape fixed on the tube according to FIG. 2 marks the intended cutting site.
In a subsequent processing step, indicated in FIG. 3, the necessary tube section 5, sized to the desired length, can be separated from the remaining tube material 1. In order to separate the tube section 5, a circular knife 6 is provided, if necessary other cutting tools may be used to cleanly cut the tube 1 as well.
In FIG. 3 it is discernible that, after the separation, the tube ends of the tube section 5 facing each other, on the one hand, and the remaining tube material 1, on the other end, are secured via an adhesive tape section 4a, 4b. Due to the fact that the adhesive tape 4 counteracts a fraying of the tube cover 3 during the separation process and due to the fact that the preferably centrally cut adhesive tape 4 remains at the tube ends of the separated section 4a, 4b, a clamping sheath 7, shown in FIGS. 4 and 5, can be slid onto the tube section 5, remaining in true form even after the separation, with the sheath for example being necessary for fixing a connector nipple inserted into the interior space of the inner tube 2 of a connector fitting. Here, the sliding on of the clamping sheath 7 is not hindered by laterally protruding metal fibers of a frayed metal web 3. A “combing” or calibrating of the sized tube section 5 with the help of clamping jaws and a tool exchange is not necessary in the method described here.
Using the method described here a tube section can be produced, with at least at one end of the tube having an adhesive tape 4a fixed with its adhesive layer on the tube cover 4, with the adhesive tape 4a enclosing the tube cover 3.
Patent Application
20080016936
