Advancing material of indeterminate length – By orbitally traveling material-engaging surface – Including details of roll or mount
Patent
1991-01-29
1994-05-03
Stodola, Daniel P.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
Including details of roll or mount
492 36, B65H 2002
Patent
active
053079736
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a profiled rod for a web-spreading roller with an approximately C-shaped, extended basic element which can be displaced in the longitudinal direction of the spreading roller, with holder shanks on both sides to hold the profiled rod in place on support rings assigned to the roller axis, which has a longitudinal, frictionally-engaged, elastic contact surface on its back.
2. The Prior Art
A profiled rod of this type, known from DE-OS 24 00 741, consists of a blade element made of aluminum, which is provided with an elastomer surface layer. The production of the two parts of the profiled rod is complicated. Application of the surface layer requires extreme care and therefore takes a lot of time. Replacement of the surface layer is almost impossible to carry out, so that a worn profiled rod must be replaced with a new one. The surface layer tends to come loose, especially in the border areas, under the effect of the forces exerted by the web.
Furthermore, a profiled rod is known from practice which consists of a C-shaped metal rail with claw-shaped, bent-in holder shanks, and a contact surface glued onto the straight back. The contact surface is a plastic adhesive coating in the form of an adhesive strip which adheres on one side. The edges of the contact surface must end at a distance from the edges of the back, because the adhesive force is not sufficient there, and the contact surface can come loose. The useful surface to transfer force to the web is limited; the durability of the contact surface leaves something to be desired, since centrifugal force works on the contact surface. Applying or replacing the contact surface for repair purposes is difficult. Often, additional adhesive is used in order to increase the adhesive strength of the contact surface.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide the type stated initially, which is durable in spite of the demanding working conditions in the spreading of webs, and distinguishes itself by cost-effective manufacture and easy installation and/or repair possibilities.
Profiled rod for a web-spreading roller with an approximately C-shaped, extended basic element which can be displaced in the longitudinal direction of the spreading roller, with holder shanks on both sides to hold the profiled rod in place on support rings assigned to the roller axis, which has a longitudinal, frictionally-engaged, elastic contact, characterized by the fact that the contact surface is attached to an intermediate carrier which is made from a more rigid material as compared with the contact surface and that the intermediate carrier is pushed onto the basic element in the longitudinal direction of the latter and held at its back and holder shanks with a clamp grip.
Since, in this embodiment, the contact surface is applied with the aid of the intermediate carrier, to the basic element responsible for holding, the intermediate carrier can be manufactured from a material which forms a very solid bond with the contact surface. The contact surface can therefore no longer separate from the intermediate carrier under the effect of the forces exerted by the web. The contact surface can furthermore extend over the entire removable width of the intermediate carrier. The intermediate carrier can be a pre-finished component with the contact surface, which can be manufactured in continuous lengths, in cost-efficient manner, and then cut to the length required in each case, and pushed onto the basic element as needed. The clamp grip of the intermediate carrier on the basic element is sufficient to reliably resist centrifugal force, on the one hand, and the forces of the web, on the other hand. The clamp grip holds the intermediate carrier with the contact surface securely on the basic element, even in the longitudinal direction, when it works on the web-spreading roller. The pre-tension is dimensioned in such a way that pulling on the intermediate carrier is easily possible, as is i
REFERENCES:
patent: 2339557 (1944-01-01), Runals
patent: 2356026 (1944-08-01), Berry
patent: 2628406 (1953-02-01), Allen
patent: 2850853 (1958-09-01), Simendinger
patent: 2977725 (1961-04-01), Simendinger
patent: 3095131 (1963-06-01), Robertson et al.
patent: 3344969 (1967-10-01), Collinge et al.
patent: 4449659 (1984-05-01), Tuchida
Geyer Werner
Lorenz Otto
Schmidt Heinrich
Bowen Paul T.
Erhardt & Leimer GmbH
Stodola Daniel P.
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