Winding – tensioning – or guiding – Tension control or brake – Supply controlled
Reexamination Certificate
2000-06-29
2001-12-11
Rivera, William A. (Department: 3653)
Winding, tensioning, or guiding
Tension control or brake
Supply controlled
C242S597300, C242S597400, C242S597600, C242S599400
Reexamination Certificate
active
06328246
ABSTRACT:
TECHNICAL FIELD
The present invention refers to a holder for rolls of web-shaped material, for example paper, nonwoven or foil, said holder comprising a shaft intended to be inserted into the centre hole of the roll, so that the rolls can rotate around the shaft for unrolling the web-shaped material, at which the shaft is provided with at least one resilient member in the form of a leaf spring having one end attached to the shaft and having a free portion which in unloaded position projects radially from the shaft for increasing the radial dimension thereof, said resilient member can be brought to spring towards the shaft.
BACKGROUND OF THE INVENTION
Holders of this kind are commonly used for example for toilet rolls, kitchen rolls, rolls for wiping material for industrial and workshop use etc. The roll is applied on the shaft of the holder and in order that it can simply rotate on the shaft the latter should have a cross-sectional dimension which is clearly smaller than the dimension of the centre hole of the roll. When the user wants to have a piece of paper, he grips the free end of the paper web and pulls so that the roll starts rotating and paper is unrolled. When a desired amount of paper has been unrolled the user cuts the paper web, e g against a tearing edge. Especially for big heavy rolls intended for away from home users, such as companies, public buildings etc. it can be difficult to stop the rotation of the roll in time and too much paper is unrolled before the rotation of the roll stops. This especially applies for rolls having a cardboard core on which the paper is rolled, said rolls often have a smooth inner surface. Besides there will easily be vibrations and noise when big heavy rolls rotate on the spindle.
GB-A-2 326 402 shows a holder for a coreless roll in which the roll is applied on a spindle around which it can rotate. The spindle is provided with a radially projecting resilient member intended to retard the rotation of the roll. The resilient member is applied to the spindle by being clamped around this. This attachment of the resilient member often involves that is can easily slide along the spindle, which can cause problem especially when changing rolls.
U.S. Pat. No. 1,851,722 shows a shaft intended to receive a paper roll, said spindle is provided with slits so that it forms a plurality of resilient fingers, which are designed to retard the rotation of the roll.
OBJECT AND MOST IMPORTANT FEATURES OF THE INVENTION
The object of the present invention is to provide a roll of the above mentioned kind in which the rotation of the roll on the shaft is retarded. The retardation should take place with a continuous and even braking effect and the initial braking effect should not be too high. The braking device should be attached to the shaft in such a way that the change of roll is not made difficult. This has according to the invention been achieved by the fact that the end of the leaf spring that is connected to the shaft is intended to be inserted and received in a passage in the shaft inside the enveloping surface of the shaft and is provided with a locking means intended to cooperate with a corresponding locking means on the shaft, so that the leaf spring is locked in axial direction on the shaft.
According to a preferred embodiment the shaft is provided with a recess into which the free portion of the leaf spring can be pressed and at least partly be received inside the enveloping surface of the shaft.
The free portion of the leaf spring is preferably substantially spoon-shaped, at which the convex surface of the spoon forms a contact surface against the inner surface of the centre hole of the roll.
Further features of the invention are disclosed in the following description.
REFERENCES:
patent: 1851772 (1932-03-01), Kleinow
patent: 2171648 (1939-09-01), Ennis et al.
patent: 2419798 (1947-04-01), Stone
patent: 2632605 (1953-03-01), Lee
patent: 3346208 (1967-10-01), Hoffman et al.
patent: 3482794 (1969-12-01), Beardsley
patent: 3484052 (1969-12-01), Clarke
patent: 3703996 (1972-11-01), Ulseth
patent: 4239163 (1980-12-01), Christian
patent: 4660781 (1987-04-01), Hazard
patent: 4690343 (1987-09-01), Goetz
patent: 5402978 (1995-04-01), Larson
patent: 5445344 (1995-08-01), Seger et al.
patent: 5645247 (1997-07-01), Voigt
patent: 5755391 (1998-05-01), Sacconi
patent: 2326402 (1998-12-01), None
Hjort Erik
Lind Mats
Burns Doane , Swecker, Mathis LLP
Rivera William A.
SCA Hygiene Products AB
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