[0001] The present invention relates to a novel device for fastening perforated cylindrical
sleeves to handles of radial hairbrushes.
[0002] At the moment, in brushes of this type, the perforated sleeve is attached permanently
to the head of the end of the radial brush handle by nailing.
[0003] This practical arrangement is suitable when the brush is new or has not been in use
for very long.
[0004] Later, due to the acids and other chemical products which are used on the hair, to
heat, and to the adverse effects of pulling during use on the hair, this nailing deteriorates
and becomes detached from the head, and the desired connection of the perforated sleeve
to the head of the handle of the radial brush is lost.
[0005] The subject of the invention has been designed to solve this problem.
[0006] For a correct understanding of the invention, two sheets of drawings are appended,
in which:
[0007] Figure 1 shows a portion of the head of the handle and a portion of the perforated
sleeve, both in section, with the fastening element already connected to these elements,
and a fastening element, separated and in line, before its insertion.
[0008] Figure 2 is a detail of a variant of the fastening element, which does not modify
the essence of the invention, viewed in elevation, at 90°, and in plan.
[0009] In Figure 3, the fastening element itself is seen in perspective and in line with
the holes in the head of the brush handle and in the perforated sleeve of the brush
itself, both of which are shortened.
[0010] In Figure 4, as in Figure 1, the fastening element is disposed in the holes in the
sleeve and in the head, both of which are sectioned for better interpretation.
[0011] The invention consists of the fact that a hole (3) is formed in the circular head
(1) of the handle (2) carrying the radial brush, the hole (3) coinciding, in position
and shape, with a second hole (4) formed in the vicinity of the lower opening of the
circular sleeve (5), which has a perforated wall and which is fitted with pressure
on the head (1) of the handle (2) for holding the brush and, when both holes are in
coinciding positions, the blunt tip of the resilient fastening device (6) is inserted
with pressure and extends across the edges of the holes (3 and 4), the said device
having a 90° peripheral projection (7) which forms a step and the wall of the rim
of which is extended in an inclined manner towards the tip of the fastening element
so that the rim of the step (7) is engaged, under pressure and by expansion, with
the edges of the holes (3 and 4), and the edges of the holes are gripped between the
step (7) and a second step (8).
[0012] When it is necessary to achieve a greater contraction and expansion of the body of
the fixing element (6), the body has a deep, perpendicular, blind slot (9).
[0013] The desired attachment of the perforated sleeve to the head of the handle is thus
achieved, and the sleeve is prevented from rotating about its own axis and from moving
axially, thus eliminating the need for the application of glues or other additives
which deteriorate in the known attachment with the heat, the humidity, and the pulling
to which radial brushes with perforated sleeves are subjected during their use.
[0014] It should be understood that, within the present invention, all details of construction
and finishing may be varied, provided that the essence of the invention is not altered,
changed or modified.
1. A novel device for fastening perforated cylindrical sleeves to handles of radial hairbrushes,
characterized in that a hole is formed in the head of the handle carrying the radial
brush and coincides, in position and shape, with a second hole formed in the vicinity
of the lower opening of the circular sleeve with perforated walls which is fitted
on the head of the handle for holding the brush and, when both holes are in coinciding
positions, the blunt tip of the body of the resilient fastening element is fitted
with pressure in the holes, the fastening element having a 90° peripheral projection
which forms a step and the wall of the rim of which is extended in an inclined manner
towards the tip of the fastening element, the edges of the holes being gripped with
pressure between the step referred to and a second step existing in the same body,
the two steps being spaced apart.
2. A novel device for fastening cylindrical perforated sleeves to handles of radial hairbrushes
according to the preceding claim, characterized in that when, owing to assembly requirements,
the body of the resilient fastening element has to be extended, a deep, perpendicular,
central notch is formed therein.
