U.S. patent application number 13/016106 was filed with the patent office on 2011-08-04 for welder protection mask.
This patent application is currently assigned to OPTREL AG. Invention is credited to Ignaz Braendle.
Application Number | 20110185480 13/016106 |
Document ID | / |
Family ID | 43843346 |
Filed Date | 2011-08-04 |
United States Patent
Application |
20110185480 |
Kind Code |
A1 |
Braendle; Ignaz |
August 4, 2011 |
WELDER PROTECTION MASK
Abstract
A welder protection mask, containing a basic support element
with a viewing opening for receiving a filter element as a dazzle
protection device. The welder protection mask includes at least one
pliable mask region which connects to the basic support element,
and the pliable mask region contains a sheet-like, wall-like mask
element or consists thereof, which is characterised by a
characteristic that it is manually deformable and may be bent into
different positions or three-dimensional shapes.
Inventors: |
Braendle; Ignaz; (Mosnang,
CH) |
Assignee: |
OPTREL AG
Wattwil
CH
|
Family ID: |
43843346 |
Appl. No.: |
13/016106 |
Filed: |
January 28, 2011 |
Current U.S.
Class: |
2/421 ; 2/423;
2/9 |
Current CPC
Class: |
A61F 9/06 20130101; A61F
9/065 20130101 |
Class at
Publication: |
2/421 ; 2/9;
2/423 |
International
Class: |
A42B 7/00 20060101
A42B007/00; A41D 13/00 20060101 A41D013/00; A41D 13/05 20060101
A41D013/05; A41D 13/11 20060101 A41D013/11 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 29, 2010 |
CH |
00108/10 |
Claims
1. A welder protection mask, containing a basic support element
with a viewing opening for receiving a filter element as a dazzle
protection, wherein the welder protection mask comprises: at least
one pliable mask region which connects to the basic support
element, and wherein the pliable mask region contains a sheet-like,
wall-like mask element or consists thereof, which is characterised
by the characteristic that the mask element is manually deformable
and may be bent into different positions or three-dimensional
shapes.
2. A welder protection mask according to claim 1, wherein the
pliable mask element is characterised by the characteristic that it
is plastically deformable in a manual manner, and is
self-supporting and shape-stable before as well as after a manual
reshaping step.
3. A welder protection mask according to claim 1, wherein the
pliable mask region comprises a flexible, pliable sheet-like mask
element which via a support and locking device fastened directly or
indirectly on the welder protection mask, on the basic support
element, may be fixed and supported in a certain position or
shaping.
4. A welder protection mask according to claim 3, wherein the
welder protection mask comprises a head strap for wearing the
welder protection mask, said head strap being fastened on the basic
support element, and the support and locking device is attached on
the head strap.
5. A welder protection mask according to claim 1, wherein the
flexible, pliable mask element is or contains a sheet-like, textile
sheet formation.
6. A welder projection mask according to claim 1, wherein the mask
element is composed of a composite of at least two materials,
wherein at least a first material is plastically deformable and
exerts a shape-stabilising effect on the mask element.
7. A welder protection mask according to claim 6, wherein the
pliable mask element as a first material has one or an arrangement
of several metal elements which assumes or assume a material
composite with a flexible or deformable material, with a material
containing or consisting of plastic, as a second material.
8. A welder protection mask according to claim 6, wherein the
pliable mask element comprises one or more metal elements which are
coated on one or on both sides with a plastic.
9. A welder protection mask according to claim 6, wherein the metal
element or metal elements of the pliable mask element are
two-dimensional-like metal elements, such as sheet metals or metal
films or metal wires.
10. A welder protection mask according to claim 6, wherein the
material composite as a first or second material comprise a textile
sheet formation.
11. A welder protection mask according to claim 5, wherein the
textile sheet formation comprises one or a combination of two or
more of the following materials, or consist thereof: plastic fibres
carbon fibres glass fibres metal fibres/metal wire.
12. A welder projection mask according to claim 5, wherein the
textile sheet formation is coated on one or on both sides with a
plastic.
13. A welder protection mask according to claim 1, wherein the
pliable mask region edges the basic support element at least on
sections, preferably completely.
14. A welder projection mask according to claim 1, wherein the
welder protection mask comprises at least one or any combination of
two or more than two of the following zones, which are designed as
pliable mask regions: side zones for covering the ear portions; a
neck zone for covering at least a part of the neck portion; a crown
zone for covering at least a part of the crown region (head upper
side); a rear head zone for covering at least a part of the rear
head, a nape zone for covering at least a part of the nape of the
neck; a jaw zone for covering at least a part of the lower jaw
portion.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a welder protection mask containing
a basic support element with a viewing opening for receiving an
optical filter element as a dazzle protection.
[0003] 2. Description of Related Art
[0004] A welder protection mask, under which a welding helmet also
falls according to definition, comprises a basic support element
which amongst other things comprises a viewing opening in which, as
a rule, a protective screen covering the viewing opening, and an
optical filter element arranged behind the protective screen, are
arranged. The basic support element of welding masks or welding
helmets, apart from the supporting function, also serves for the
protection of the welder from mechanical effects and from thermal
radiation. The basic support element usually consists of a plastic,
for example of polyamide and is usually manufactured by way of
injection moulding. The filter element is arranged in the viewing
opening of the supporting part and serves for the optical
protection of the mask wearer, thus it represents the actual dazzle
protection of the device. The filter element may be passive, which
means it may consist of back glass. The filter element may also be
active, which means it blocks or reduces the light passage when the
dazzle protection device detects the light of a welding arc. The
protective screen covers the viewing opening of the supporting part
in a manner such that the filter element, and, as the case may be,
the optical sensor, are positioned behind the protective screen,
which means that in the worn condition, are positioned between the
protective screen and the eyes of the welder. The protective screen
is transparent and serves for the protection of the optical filer
element from contamination or damage.
[0005] Radiation, as is known, represents a significant danger to
health. Despite the welder protection mask or welding helmet with
an optical filter element described above, the case may occur, that
radiation is reflected behind the welder and, thus, gets into the
helmet from the rear. The light in turn is thrown back by the
filter element and may dazzle the welder. The problem here above
all arises when the welder protection mask is not optimally adapted
to the shape of the head of the welder and therefore openings to
the rear, between the mask and the head, are formed for the entry
of radiation.
[0006] Although there is the possibility of closing the welding
helmet also at the back of the head, by way of assembling an
additional leather flap on the protection helmet, the assembly and
handling is however not user-friendly. Moreover, the air
circulation in the helmet is rendered more difficult due to the
closure, from which an unpleasant development of heat results in
the inside of the helmet.
BRIEF SUMMARY OF THE INVENTION
[0007] It is therefore the object of the present invention, to
further minimise the danger of dazzling due to the above-mentioned
reflections by way of an improvement of previous welder protection
masks. Moreover, the possibly of the welder protection mask being
adapted individually to the head shape of the individual user is to
be created, without, for this, having to produce individualised
welder protection masks matched to the user, as individual
manufactures.
[0008] The object is achieved by way of the welder protection mask
having at least one pliable mask region which connects to the basic
support element and by way of the pliable mask region containing
sheet-like, wall-like mask elements or consisting thereof, which is
characterised by the fact that this is manually deformable and may
be bent into different positions or three-dimensional shapes.
[0009] According to a first embodiment of the invention, the
pliable mask region comprises a pliable, flexible sheet-like mask
element which does not need to be shape-stable, but may be
shape-stable according to the subsequent definition. The pliable
element may e.g. be a textile sheet formation. The textile sheet
formation may e.g. be coated on one side or on both sides with
plastic. The coating may likewise be effected by way of rear
injection moulding or peripheral injection moulding of the textile
formation, with an injection moulding method.
[0010] The mask element may be supported and fixed in defined
positions or a defined shaping, by way of a support and locking
device which is attached on the welder protection mask, in
particular on the basic support element, in a direct or indirect
manner. The support and locking device contains e.g. an adjustment
mechanism which permits the pliable mask element to be set in more
than one position or shaping and permits this to be fixed. Since
the pliable mask element is not shape stable and is not
self-supporting, it must be supported on the one hand by the
support and locking device and one the other hand it must be held
in its set position or shaping. The support and locking device may
e.g. be formed by a head strap or be fastened on this. The head
strap in turn is attached on the welder protection mask, in
particular on the basic support element, and serves for the support
of the welder protection carrier mask.
[0011] According to a second embodiment of the invention, the
pliable mask elements are characterised by the fact that these are
manually plastically deformable, and are or remain shape-stable
before as well as after a manual deformation step.
[0012] The plastic deformation or plasticity describes the
capability of solid substances to deform under a force effect, here
by way of manual force and to retain this shape after the effect.
In particular, the shape-stability of the pliable mask elements is
ensured under the influence of gravity and advantageously also
under the influence of the weight force of the welder protection
mask. The mask elements, despite the plastic deformability, are
self-supporting in a certain manner and have the necessary
shape-stiffness, in order to retain the mask in the set geometric
shape. Moreover, practically no springing-back of the deformed
parts takes place, as is the case e.g. with an elastic deformation.
The plastic deformation thereby is reversible inasmuch as the
deformed region may be shaped back into its initial or
approximately initial position.
[0013] The mask elements may be an integral component of the welder
protection mask. I.e. they form an integral unit with the basic
support element. The mask elements may however also be designed as
individual elements which are attached to the basic support element
via suitable connections or connection combinations such as a
positive-fit connection (e.g. snap connection, clip connection,
plug connection, rivet connection, etc.) a non-positive fit
connection (e.g. screw connections, etc.) or material-fit
connections (e.g. gluing, soldering, welding etc.). The connections
may be releasable or non-releasable.
[0014] The basic support element may be designed of one part or of
several parts. It may be composed e.g. of sheet-like, wall-like
sections. Usefully, the basic support element forms a type of
shell-like element. The basic support element is advantageously not
designed in a plastically deformable manner, but has an increased
stiffness compared to the pliable mask elements. The stiffness of
the basic support element is preferably designed such that this on
the one hand has certain impact strength with regard to mechanical
effects and on the other hand permits a limited plastic or in
particular elastic deformability. The basic support element may
also be indicated as a mask body.
[0015] If the welder protection mask is closed either for the most
part or completely in the upper region, i.e. in the crown region,
then it may also be described as a welder helmet. The basic support
element is then preferably present as a helmet shell.
[0016] Basically however, it is also conceivable for the basic
support element, as the flexile mask regions, to likewise consist
of a pliable material or material composite which is characterised
by the fact that this is plastically deformable by hand and has
shape-stability before as well as after a manual reshaping step.
Thereby, it may be the case of the same material or the same
material composite as with the pliable mask regions. One may
however also use a different material or a different material
composite. One may in particular envisage the basic support element
having a greater shape-stability than the pliable mask region which
connects to the basic support element, or one may envisage greater
reshaping forces being necessary for the plastic deformation of the
basic support element, e.g. by hand, than is the case for the
pliable mask region.
[0017] The basic support element is preferably designed such that
this, with regard to the mask wearer, covers at least one front
region, in particular the eye portion and nose portion and, as the
case may be, parts of or the complete chin portion and forehead
portion. The basic support element may however also yet cover other
face zones or head zones such as the temple zone, the cheek zone or
the crown zone of the mask wearer.
[0018] In the context of the present description, the term
"material" is used as a collective term, which may include a
semi-finished project, a substance, a starting material, an
auxiliary material or a base material. Apart from this, a material
may also be present in the raw condition or pre-processed
(semi-finished product), such as e.g. a textile sheet formation.
Moreover, a material may also represent a material composite.
[0019] The term substance in this context is to be understood as
starting substances such as metals, plastics, carbons, glass etc.,
from which products or intermediate products (semi-finished
products) may be manufactured. The term "material" is thus to be
superordinate to the term "substance".
[0020] The pliable mask element or elements are preferably composed
of a material pairing or a material composite of at least two
materials, with which at least a first material is plastically
deformable and exerts a shape-stabilising effect on the mask
element. I.e. the first material effects the shape stability of the
mask element and is therefore itself also shape-stable. Such a
material may e.g. be a metal such as aluminium or an iron metal,
such as steel or stainless steel, which is present in a suitable
form, e.g. as a sheet-like object, such as sheet-metal or film or
also as wire or a wire composite with the corresponding
characteristics of the plastic deformability. The metal film or the
sheet-metal as well as a wire composite (wire mesh) may, for this,
be present in a two dimensional form.
[0021] The sheet metal or metal film may further comprise recesses
such as holes or directed longitudinal holes (depending on the
preferred bending direction), for an improved reshaping ability.
The sheet metal or metal foil may e.g. be designed as a perforated
sheet or perforated film. Moreover, one may also combine strips of
sheet-metal or metal films into a lattice-like structure, which
together with at least one further material, are put together into
a material composite. Moreover, the mentioned lattice-like
structure may also be worked from a sheet material or a metal film,
e.g. by way of punching.
[0022] Furthermore, the metal element may also be present as a wire
mesh which is likewise put together with at least one further
material, into a material composite. In the last-mentioned cases,
with which the two-dimensional-like (having a very large surface to
volume ratio) metal is not designed in a continuous manner, the
material composite despite this is usefully a sheet-like, wall-like
and continuously closed mask element which in particular lets
through no light. In this case, one is to envisage at least one
second material which is used apart from the metal element or
elements, forming a continuous, closed surface.
[0023] A sheet-metal or a metal film has e.g. a thickness of 0.1 to
1 mm, preferably 0.2 to 0.5 and in particular about 0.3 mm. A metal
wire may e.g. have a diameter of 0.1 to 1 mm in particular from 0.2
to 0.5 mm.
[0024] In a preferred further development of the invention, the
mask element has one or more metal elements which, with a
deformable, preferably elastically and/or plastically deformable
material, such as e.g. with a plastic, assumes or assume a material
composite. For this, the metal elements may be coated on one side,
on both sides or completely, with plastic. The plastic coating may
e.g. be 0.1 to 1 mm, in particular 0.2 to 0.5 mm. The plastic is
preferably a thermoplastic plastic such as e.g. polyamide, in
particular PA 66 or a thermoplastic elastomer. The metal elements
may be treated with a bonding agent before the coating with
plastic. The metal elements are preferably back injection moulded
or peripherally injection moulded with the plastic by way of the
injection moulding method.
[0025] For this, the metal elements are usefully designed as inlay
parts which thereafter are rear injection moulded or peripherally
injection moulded with the plastic by way of the injection moulding
method.
[0026] The pliable (flexible), bendable sheet-like mask elements,
as a first or a second material according to the second embodiment,
may also contain a textile sheet formation. If the textile sheet
formation is a first material, then this has a corresponding
plastic deformability with a shape-stability described above. The
textile sheet formation for this may contain fibres of metal or of
metal wire or consist of this. If the textile sheet formation is a
second material which is combined with a plastically deformable
first material into a material composite, then this may be pliable
or flexible, but not shape-stable. The textile sheet formation may
also be coated on one side or on both sides with plastic, by way of
e.g. back injection moulding or peripheral injection moulding. Here
too, the plastic may be a thermoplastic plastic such as e.g.
polyamide, in particular PA66 or a thermoplastic elastomer.
[0027] The textile sheet formations mentioned with regard to the
first and second embodiment may e.g. be woven fabrics, knitted
fabrics, knitwear or non-wovens. The textile sheet formations may
be constructed from one or a combination of two or more of the
following materials or may contain these:
[0028] plastic fibres
[0029] carbon fibres
[0030] glass fibres
[0031] metal fibres/metal wire.
[0032] The pliable mask region may edge the basic support element
in sections or completely, so that in particular the terminal
portion of the welder protection mask towards the neck or towards
the back of the head, may be adapted to the shape of the head or
the neck, like a collar, and possible entry openings for radiation
between the mask and head may be closed in this manner. The width
of the edging or the edge section may be up to several centimetres,
in particular 0.5 to 15 cm, preferably 1 to 10 cm. The pliable mask
region may have a surface size of several square centimetres, e.g.
up to 1 to 200 cm.sup.2, in particular 10 to 100 cm.sup.2. The mask
elements have e.g. a total thickness of 0.3 mm, in particular 0.5
to 2 mm.
[0033] Thanks to the pliable mask regions, the mask wearer may
adapt the shape of his mask at least partly in an individual manner
according to his wish, by way of him bending the helmet edging or
part regions thereof, e.g. inwards, in an infinite manner, in order
thus to prevent the entry of radiation from the rear into the
helmet.
[0034] The pliable mask regions may cover one or a combination of
two or more of the following zones of the welder protection mask,
in each case individually, as a group or as a continuous
region:
[0035] side zones for covering the ear portions;
[0036] a neck zone for covering at least a part of the neck
portion;
[0037] a crown zone for covering at least a part of the crown
region (upper side of the head);
[0038] a rear head zone for covering at least a part of the rear
head;
[0039] a nape zone for covering at least a part of the nape of the
neck;
[0040] a jaw zone for covering at least a part of the lower jaw
portion:
[0041] a cheek zone for covering the cheek regions.
[0042] The pliable mask elements or mask regions are usefully
designed and deformably attached to the welder protection mask or
connected to this, such that no radiation may get from the side or
the back, into the mask. In particular, no radiation may get
through the mask elements. The term "radiation" is above all to be
understood as visible light and UV (ultraviolet) radiation.
Moreover, however a shielding with respect to IR (infrared)
radiation by the mask element is also desired. I.e. the mask
elements should preferably have an insulating effect also with
regard to heat radiation.
[0043] With the first as well as the second embodiment, under
certain circumstances, it is recommended to segment the pliable
mask region and to construct it from several deformable mask
elements, in order in this manner to prevent a material
displacement with a surfaced reshaping of a mask region.
[0044] Thanks to the pliable mask regions according to the
invention, the welder protective masks, in particular welding
helmets, have a high deformation freedom, so that the mask shields
the mask wearer in an optimal manner, also to the rear. Apart from
the shielding from radiation, the adaption of the pliable mask
regions, in particular of the pliable edge sections of the mask, to
the contour of the head or the neck, also has the advantage that
the fit of the mask is generally improved. The welder protection
mask may even be designed such that, thanks to the pliable mask
region, in particular the pliable edging, it may be individually
adapted to the head geometry of the mask wearer.
[0045] The pliable mask regions moreover permit a tight bearing of
the welder protection mask on the head, so that e.g. one may work
better in restricted conditions. The pliable mask regions may also
be provided, in order to permit the wearing of an ear protection, a
hard hat or e.g. a breathing apparatus, under the welder protection
mask. I.e., the pliable mask regions may be suitably adapted to the
contour of these apparatus. Moreover, the pliable mask regions may
also serve for individually setting the fresh air supply by way of
varying the opening widths.
BRIEF DESCRIPTION OF THE DRAWINGS
[0046] The subject matter of the invention is explained hereinafter
in more detail by way of preferred embodiments which are
represented in the accompanying drawings. There are shown in each
case in a schematic manner:
[0047] FIG. 1: a first exemplary embodiment of a welder protection
mask according to the invention;
[0048] FIG. 2a-c a second exemplary embodiment of a welder
protection mask according to the invention, in different
perspective views;
[0049] FIG. 3a-c a third exemplary embodiment of a welder
protection mask according to the invention, in different
perspective views;
[0050] FIG. 4a-4i different embodiments of inlay parts for creating
pliable mask elements according to FIG. 3a-3c
[0051] FIG. 5a-5b one exemplary embodiment of a protective and
locking device for pliable mask elements on a welder protection
mask.
DETAILED DESCRIPTION OF THE INVENTION
[0052] The reference numerals used in the drawings and their
significance are listed in a conclusive manner in the list of
reference numerals. Basically, the same parts in the figures are
provided with the same reference numerals. The pliable mask regions
5, 15, 25 which are shown in FIGS. 1 to 4, are sheet-like,
wall-like elements with a construction described in the general
description part and with the characteristics which are likewise
described in this description part.
[0053] The welder protection mask 1 according to FIG. 1 comprises a
basic support element 2 with a viewing opening 3. The basic support
element 2 is designed such that this covers the crown zone 60, the
forehead zone 65, the nose zone 61, the temple zone 62, the chin
zone 63 and by way of the viewing window, the eye region 64 of the
mask wearer (not shown). As a rule, a protective screen and
therebehind an optical filter element as a dazzle protection are
arranged in the region of the viewing opening 3, which however are
not shown in the present embodiment. Moreover, the welder
projection mask 1 in each case comprises a pliable mask region 5 in
the form of an edge section which covers a side zone 71 for
covering the ear portions, the neck and/or the low chin portion 73
of the mask wearer. The pliable mask region 5 connects to the basic
support element 2 and is releasably or non-releasably connected to
this. The gap opening between the rear head or the lower jaw/neck
and the mask may be closed thanks to the pliable mask region 5, by
way of deforming this pliable mask region 5 to the contour of the
head.
[0054] The welder protection mask 11 according to FIGS. 2a to 2c
comprises a basic support element 12 with a viewing opening 13. The
basic support element 12 is designed such that this covers the
forehead zone 65, the nose zone 61, the temple zone 62, the chin
zone 63 and, by way of the viewing window, the eye region 64 of the
mask wearer (not shown). A protective screen 14 and therebehind, as
a rule an optical filter element (not shown) as a dazzle
protection, are arranged in the region of the viewing opening 13.
Moreover, the welder protection mask 11, furthermore, in each case
has a pliable mask region 13 in the form of an edging of the basic
support element 12. The edging in each case covers a side zone 71
which covers the ear portions, a part of the chin zone 72, a lower
jaw portion 73 as well as a part of the crown zone 74 of the mask
wearer. The pliable mask region 15 connects to the basic support
element 12 and is releasably or non-releasably connected to this.
Thanks to the pliable mask region 15, the opening may be closed
over the whole edge region of the mask 11, specifically between the
crown zone, the rear head, the lower jaw, the chin and the neck of
the mask wearer, by way of the mentioned pliable mask region 15
being shaped to the contour of the head. The pliable mask region 15
runs round the edge region of the mask in a complete manner and in
this manner forms a mask region which is closed in a ring-like
manner (see FIG. 2c).
[0055] The welder protection mask 21 according to FIGS. 3a to 3c
comprises a basic support element 22 with a viewing opening 23. The
basic support element 22 is designed such that this covers the
forehead zone 65, the nose zone 61, the temple zone 62, the chin
zone 63 and, by way of the viewing window 23, the eye region 64 of
the mask wearer (not shown). A protective screen 24 and
therebehind, as a rule an optical filter element (not shown) as a
dazzle protection, are arranged in the region of the viewing
opening 23. Moreover, the welder protection mask 21 furthermore in
each case has a pliable mask region 25a, b in the form of an edge
region designed in a droplet-like manner, on the basic support
element 22. In each case, a pliable mask region is provided for the
left 25b and for the right 25a head side. The pliable mask region
25 covers in each case, a side zone 71 which covers the ear
portions of the mask wearer, and connects to the basic support
element 22. The pliable mask region 25 is releasably or
non-releasably connected to the basic support element 22. The
pliable mask region 22 furthermore has a curved, shell-like shape
and for this is designed to receive a capsule or a capsule ear
protection (not shown). The adaptation of the pliable mask region
25 to the ear protection capsule is likewise effected via plastic
deformation of the pliable mask region 25.
[0056] FIGS. 4a to 4i show different embodiments of inlay parts of
a sheet metal or of a metal film, for the single-sided or
double-sided coating with a plastic or the provision with a textile
formation. The coating with plastic may be effected in an injection
moulding method. The material composite containing the inlay part
of the shown type, results in a mask element which may be deformed
by hand, with a suitable shape stability, as is applied, for
example, in the embodiment according to FIGS. 3a-3c.
[0057] The inlay part 80 according to FIG. 4a is designed as sheet
metal or metal film. According to FIG. 4b, elongate holes are
incorporated in the transverse direction to the inlay part 81, in
the sheet metal or the metal film. By way of this, the inlay part
81 or the mask elements which are manufactured therefrom, may be
easily bent or deformed in the elongate hole direction, thus in the
transverse direction. The inlay part 82 according to FIG. 4c
comprises finger-like, parallel arranged integral formations which
are capable of supporting a second composite material. The inlay
part 83 according to FIG. 4d contains circular holes for reducing
the stiffness of the inlay part. According to FIG. 4e, curved
elongate holes are provided in the longitudinal direction of the
inlay part 84, which improve the deformation ability in its
longitudinal direction. The inlay part 85 according to FIG. 4f
comprises diagonally orientated, shortly curved elongate holes. The
embodiment examples according to the FIGS. 4g, 4h and 4i shows
different shapes of a lattice-like construction of the inlay parts
86, 87 and 88. A lattice-like construction of the inlay part
improves the deformation ability in the longitudinal direction as
well as in the transverse direction of the inlay part.
[0058] The recesses further also serve for saving material and
weight. The second composite material, e.g. plastic or a textile
formation cover the inlay parts, however, usefully over the whole
surface and thereby assume the shielding function.
[0059] The support and locking device 91 which is shown in FIGS. 5a
and 5b serves for the fastening of pliable mask elements (not shown
here), in particular those mask elements which are not
shape-stable, on the welder protection mask. The support and
locking device 91 is fastened indirectly on the welder protection
mask (not shown here) via a head strap 90 which is only shown in a
partial manner at this location. With regard to the head strap, it
is the case of a conventional head strap as is known from the state
of the art, which is fastened on the mask and via which the mask is
worn on the head. The support and locking device 91 may be
connected to the head strap 90 in a releasable or non-releasable
manner or even integrally. The support and locking device 91 has a
fastening region 92, here a fastening opening, for the attachment
of the pliable mask element (not shown here). The support and
locking device 91 may be displaced at least between two positions
(FIG. 5a, 5b) or may be fixed in the mentioned positions by
rotation, so that the pliable mask element may be brought into
different positions and also be supported in these.
* * * * *