Process and device for bringing into alignment the strings of an

Details Process and device for bringing into alignment the strings of an Process and device for bringing into alignment the strings of an

1996-07-19

1998-10-20

Stoll, William E.

Games using tangible projectile

Player held and powered, nonmechanical projector, per se,...

Racket or paddle; accessory therefor

A63B 5100

Patent

active

058239006

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a first device for bringing into alignment the strings of an interlaced network with a base plate and a number of aligning elements, whereas the aligning element is designed as a thin plate which catches hold of the strings near their intersection, a second device for brining into alignment the strings of an interlaced network with a base plate and a number of aligning elements, whereas the aligning element has a tapered aligning area for aligning the strings, this aligning area being bent parallely to the base plate in such a way that the aligning element touches the string to be aligned nearly punctually, as well as a holding area with two parallely arranged flat sides holding at least one string, a third device for bringing into alignment the strings of an interlaced network with a base plate and a number of aligning elements being, in their outline, either semi-elliptical, semi-circular or of the shape of a tapered pointed arch and a method for bringing into alignment the strings of an interlaced network with an aligning device, the aligning device being first pressed into the interlaced network with its aligning elements.
Such a first device is known from DE-GM 88 01 337, such a method and such a second device from U.S. Pat. No. 4,733,866 and such a method and such a third device from FR 2,661.102.
The stringing of rackets of ball-games, for example tennis-rackets, squash-rackets, badminton-rackets and the like changes during the game due to the shifting of the strings of the interlaced network under the impact of the ball. Due to this shifting of the strings, the quality of the stringing changes disadvantageously. That is why the players can often be seen, at half-time, trying, with little success, to reset the strings.
In the past, devices have been suggested to align the strings of an interlaced network, especially of tennis-rackets. Those of most importance will briefly be discussed in the following:
In DE-GM 88 01 337 a device for aligning the stringing of a racket has been disclosed which catches hold of the strings at their intersection. Therefore, aligning elements consisting of thin plates and with flattened sloping sides are arranged onto a base plate. The aligning elements are hereby flattened in such a way that the thin plate has a triangular outer shape. The plates are thereby arranged onto the base plate so that they occupy each second window of a row and a column.
This aligning device cannot align the strings of a tennis-racket with the necessary accuracy, as it cannot bring the strings up to the base plate. Although, the strings are brought up to the base plate on the edge of the stringing, this is not achieved in the most important area, that is to say in the center part of the stringing, as the force exerted onto the string causes this same string to lengthen and to bend away from the base plate, due to its elasticity. Thus, between each string in the center part of the interlaced network and the base plate a gap of a few millimeters remains, rendering a precise alignment of the strings impossible.
A second problem consists in that the oblique bevelled faces of the plate form, together with the side faces, a sharp edge, which can damage and even cut through the strings.
U.S. Pat. No. 4,733,866 disclosed a portable device for aligning the strings of tennis-rackets touching the string to be aligned nearly punctually, the touching point being located more or less in the middle between two adjacent intersection knots. This device for aligning strings has spaced aligning elements being arranged in only one row. These aligning elements have a bottom area with a square section, side faces being arranged vertically to the base and a top area having either a shell or a pyramidal shape with bent wall faces. The transition between top and bottom area forms an edge.
FR 2,661,102 discloses a device for aligning strings having only three rows and five columns and in which the aligning elements are arranged symmetrically to the axis of rotation and have a cylindrical-pointe

REFERENCES:
patent: 4089523 (1978-05-01), Newburger
patent: 4489942 (1984-12-01), Kent
patent: 4733866 (1988-03-01), Herbert
patent: 4989864 (1991-02-01), Ubl
patent: 5310181 (1994-05-01), Chan
patent: 5441258 (1995-08-01), Pagan

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