Buckles – buttons – clasps – etc. – Belt fasteners – Hinged ends of endless belts
Patent
1988-10-14
1990-08-07
Brittain, James R.
Buckles, buttons, clasps, etc.
Belt fasteners
Hinged ends of endless belts
24 31F, 29423, 29464, 29467, D21F 112, D21F 710, F16G 304
Patent
active
049456121
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a system and a method for joining the ends of a band-shaped elongate element and, more particularly, to a system and a method wherein alignment strips are fastened in the vicinity of the ends of the elongate element, both alignment strips being formed by a sheet-like part one edge of which is provided with a U-shaped element.
BACKGROUND OF THE PRIOR ART
Methods and systems of the above type are well-known in various technical fields, for joining the ends of a band-shaped product into an endless band. Such technical fields include wood processing industries in which endless wires and felts are used, e.g., for drying paper webs in paper machines. Cellulose and paper board machines are further known applications.
The joining of the ends of a band-shaped product, such as a wire or felt, is of essential importance in wood processing industries in particular, since wires or felts woven endless are always very difficult to mount in place due to the fact that it is necessary to disassemble the supporting structure of the rolls on one side to be able to place the wire or felt in a paper machine, for instance. The disassembly and assembly of such structures is difficult, and plenty of room is required at the side of the machine as the wire or felt is mounted from the side. Furthermore, endless felts and wires are heavy and large, wherefore they are difficult to handle.
For this reason, it is customary to weave the wire or felt into a band-shaped product the ends of which are not joined until in the machine. It is thereby possible to draw the wire or felt on the rolls in the operating direction of the machine. Various methods and arrangements have been developed for temporarily joining the ends of the wire or felt e.g. in a paper machine After the temporary joining, a permanent joint is formed and the temporary joint is opened.
Known solutions include the method and means disclosed in Swedish Published Specification 435,207 for joining the ends of a band-shaped product. This known solution utilizes a so called zipper principle, whereby ribbons are fastened adjacent to the ends of the product to form the zipper halves The ends of the product can thereby be joined by means of a connecting slide which functions in the same way as a conventional zipper slide. After the forming of the temporary joint, the proper joint is formed e.g. by passing a joint thread through loops provided at the ends of the product. The zipper parts are naturally removed after the permanent joint is completed.
Another example of known solutions would be the device disclosed in Finnish Patent Application 840,804. In this known solution the ends of a band-shaped product are provided with interlocking clasp means by means of which the ends are joined temporarily. After the temporary joint has been formed in this way, the permanent joint is formed e.g. in a manner described in connection with the preceding known solution. After the permanent joint has been formed, the clasp means are removed from the band-shaped product.
A disadvantage of these known solutions is, for instance, that the locking of the ends of the band-shaped product may open when used as an aid in the mounting. A further disadvantage is that the adjustment is difficult, i.e. the two sides of the joint are difficult to get properly in alignment, wherefore the joint thread or wire is difficult to pass in place. In addition, if the joint is not quite straight, the joining is difficult to be carried out by means of known solutions. Also, the use of known solutions is difficult and laborious, as a result of which the change of a felt, for instance, is slow. Prior solutions are suitable for temporary joining only, whereby the permanent joint always has to be made by means of different joining means.
The object of the invention is to provide a method and an arrangement for joining the ends of a band-shaped product, which avoid the disadvantages of the prior art. This is achieved by means of a method according to the invention which is cha
REFERENCES:
patent: 1033774 (1912-07-01), Andres et al.
patent: 1774807 (1930-09-01), Mildren
patent: 2324171 (1943-07-01), Paradise
patent: 3274707 (1966-09-01), Garden
Brittain James R.
Tamfelt Oy AB
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