Brushing – scrubbing – and general cleaning – Implements – Brush or broom
Patent
1998-07-23
2000-12-19
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Implements
Brush or broom
151671, A46B 908, A46B 910
Patent
active
061612456
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to brushware comprising a bristle carrier and bristles fixed thereto, which are either arranged singly or in bundles and whose hardness is adjustable.
BACKGROUND AND SUMMARY
In the sense of the present invention brushware is understood to mean all products which are equipped with bristles or bristle bundles. These include in particular brushes of all types, no matter whether they are manually or mechanically operated, tools provided with bristles or components provided with bristles which are supplemented to form tools, as well as paintbrushes of all types.
The hardness of a bristle is essentially determined by its length and cross-section, as well as by the material choice. The choice of bristle hardness is in turn determined by the intended use of the brushware or the in each case desired function. In the case of brushes for cleaning dirty surfaces, as well as for technical functions, the scratching and brushing action is vital, i.e. the bristles must be correspondingly hard or coarse. In the case of brushes for polishing purposes, light cleaning work, etc., a more rubbing action is desired, which requires softer or finer bristles. The same applies with respect to paintbrushes and particularly in the latter connection a wide graduation is desired. This is not only implemented by the characteristics of the individual bristle, but also by the way in which the bristles are formed into bundles. The same applies for brushes in the hygienic sector, e.g. tooth, cosmetic, body and massaging brushes. In the case of toothbrushes three degrees of hardness have proved necessary, i.e. coarse, medium and fine, in order to meet the individual requirements of the user.
So that in the case of a brush having a specific intended use, an individual brush is not necessary for each degree of hardness, brushes with variable bristle hardnesses are known. This takes place in all the known constructions exclusively by modifying the free length of the bristles, i.e. the bristle bending length acting under force action. It is known (DE 2 114 533) to draw a perforated plate over the bristles fixed to the bristle carrier and the spacing thereof from the bristle carrier can be adjusted by a control or adjusting device. The essential bending length of the bristles is then determined by their length projecting over the perforated plate and can be continuously and individually adjusted.
In another known construction (U.S. Pat. No. 1,189,698) the bristle carrier is hollow and the bristle bundles are located in inclined manner in said cavity and are fixed to a slide. The bundles pass through a bristle carrier wall provided with holes and by means of the slide can be slid out or drawn in to different lengths.
These known constructions, which have only proved partly satisfactory in practice, give rise to problems especially in the hygienic sector. As the bristle bundles are movable relative to the holes in which they are guided, corresponding guide gaps must be provided. Dirt and care agents are deposited in the said gaps and also form hygienically unacceptable bacteria accumulations. As a result of hardening care agents, such as dental care agents and the like, encrustations occur, which finally lead to unserviceability. It is also disadvantageous that the bristle or bristle bundles must have a length permitting the adjustment of the greatest free bending length, i.e. a very soft setting, although the user may only wish for a medium or hard setting. This also presupposes a corresponding overall height of the bristle carrier with its guidance and control device. With numerous brushes, such as toothbrushes, cosmetic brushes, etc., a particularly small overall height is desired.
The known systems with variable bristle length have consequently only individually proved successful in practice, particularly in the case of massaging brushes (DE 2 114 533). This technology has not been used in practice for toothbrushes, so that an individual toothbrush is always offered for each degree of hardness. Quite apa
REFERENCES:
patent: 2882544 (1959-04-01), Hadidian
patent: 3065757 (1962-11-01), Peilet
patent: 3082457 (1963-03-01), Lucibello et al.
Coronet-Werke GmbH
Graham Gary K.
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