Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
  • A43D11/00—Machines for preliminary treatment or assembling of upper-parts, counters, or insoles on their lasts preparatory to the pulling-over or lasting operations; Applying or removing protective coverings
  • A43D11/003—Applying or removing protective coverings
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B3/00—Footwear characterised by the shape or the use
  • A43B3/16—Overshoes
  • A43B3/163—Overshoes specially adapted for health or hygienic purposes, e.g. comprising electrically conductive material allowing the discharge of electrostatic charges

Definitions

• the present invention relates to a method as well as an installation for its implementation allowing the manufacture of a protective envelope for shoes, boots, .., usable in all areas where there is the problem of isolating a nobody from the outside world, such as for example in the medical field.
• the method according to the invention consists in producing a protective envelope around each of the shoes (or the like) worn by the user, said method being characterized in that the development of said envelope is carried out on the site of use, directly on the person and this, by implementing at least the combination of the following operations:
• a non-woven sheet or film based on a material is used making it possible to obtain a heat-sealing or heat-bonding of said sheet.
• an additional reinforcing element is associated with the underside of the ply when it is shaped like an open U-shaped shell, in the zone intended to form the base of said shell and corresponding to the underside of the foot;
• a clamping element around the leg of the user such as an elastic band, stretch tape, is attached to the upper part of the shell, along the open area.
• the installation for the implementation of the aforementioned method consists of an assembly arranged on the site of use itself and which comprises, mounted on a base or support block, fixedly, two elementary blocks for forming the envelope around the user's shoe and whose structure is such that:
• one of the blocks comprises means making it possible to deliver a flat sheet (nonwoven or film) to a set allowing to put said sheet in the form of an open U, the lateral faces of which are kept pressed against the surfaces of the two elementary blocks;
• the two elementary blocks comprise means which, in cooperation, make it possible to shape said flat U-shaped sheet around the shoe of the user and to secure the facing faces of this sheet along lines passing through the plane bisector of the two lateral shaping blocks and arranged one on the front of the foot, the other at the back of the heel.
• the means for ensuring the connection of the sheet to form the envelope around the shoe of the user, sotn constituted by a set of movable retractable bars making it possible to simultaneously ensure the welding and cutting of the sheet according to the desired profile around the shoe.
• Such bars are preferably adjustable in spacing to adapt to the different sizes of shoe to be covered.
• the means for putting the sheet of material in the form of a U-shaped envelope are, according to one embodiment, constituted by a set of movable clamps along two opposite guide rails, arranged between the two blocks. Furthermore, the retention of said sheet against the surfaces of the conforming blocks is against the support base and preferably obtained by suction.
• the installation according to the invention comprises means allowing a reinforcement of the zone of the sheet intended to be arranged below the shoe as well as means making it possible to have a clamping element, such as an elastic element (self-adhesive stretch tape, for example) at the top of the sheet.
• a clamping element such as an elastic element (self-adhesive stretch tape, for example) at the top of the sheet.
• - Figure 2 is a cross section of said machine, schematically showing its structure and operation;
• - Figure 3 is another perspective view showing in greater detail how the sheet is delivered allowing the protective envelope according to the invention to be produced, as well as the assembly allowing the installation of an elastic element, such that extendable tape, at the top of the envelope in order to obtain a tightening around the user's leg.
• FIG. 1 schematically illustrates, in perspective, the whole of an installation allowing the implementation of the process according to the invention, a process which generally consists in carrying out on the site of use , directly on the person, the protective envelope intended to cover his shoes or boots.
• such a machine consists essentially of two assemblies or shaping blocks, respectively (A) and (B), mounted on a support base (C).
• the two shaping assemblies (A) and (B) are fixedly mounted on the support block (C), and are spaced from each other by a sufficient distance to allow the passage of the foot of a person provided of a shoe.
• the installation according to the invention comprises all of the following means.
• the raw material, nonwoven or film preferably, is stored in the form of a roll (1) inside the block (B).
• This material can be delivered by means of a roller drive system (2), allowing it to be delivered in the form of a flat sheet (3) in the space between the two blocks (A, B ).
• the installation inside the space between the two blocks (A, B) is carried out so that this sheet (3) is arranged in the form of an open U, whose lateral faces are maintained pressed against the facing surfaces of the two elementary blocks (A, B).
• the installation is carried out by means of two transfer elements (4,5) parallel, arranged at each of the ends of the open area.
• These transfer elements (4,5) are schematically in the form of a clamp system (6,7) associated with means such as rails or guide belts.
• the clips per ⁇ put to grip the end of the sheet (3) at the outlet of a slot (8) provided in the upper part of the block (B) which extends over the entire length of the latter.
• the clamps (6,7) are moved simultaneously along the rails or belts (4,5), and therefore put the strip of material (3) in a U shape inside the space taken between the blocks (A, B).
• the support both against the side walls and against the lower surface (10) of the base (C) is obtained by means of a suction system.
• a suction system can consist of two suction assemblies (11,12) provided in each of the blocks (see FIG. 2), making it possible, via suitable conduits opening into orifices provided on the side walls, to hold the strip of plated material as shown in Figure 2. Furthermore, as can be seen in FIG.
• the base (10) supporting the lower part of the U-shaped sheet is constituted by a movable assembly in the form of a tray. (13) can be actuated vertically by means of a jack system (14).
• the covering sheet thus being placed inside the installation, the production of the closed envelope around the user's foot is ob ⁇ held by means of two shaping assemblies essentially consisting of sealing bars- cutters (15,16,17, 18).
• the heat-seal cutter assemblies will be identical for each of the two blocks (A, B) and can be moved from a retracted position inside each of the blocks to a position passing substantially through the bisector plane of the two blocks.
• such an installation also comprises means (20, 21) allowing the establishment of a reinforcing layer in the zone intended to be disposed below the foot, as well as means (22) allowing to have an expandable element (27) at the periphery of the envelope ensuring its perfect retention around the user's leg.
• the drive rollers (2) deliver a certain length of film (3) in the cavity (20,21) intended to form the reinforcing surface which must be attached below the protective envelope. This length of film is cut and is held against the surface of one of the elements of the impression (21).
• the film (3) is again driven by the rollers (2), passes through the slot (8) and its ends are gripped by the lateral pins (6,7). It is pulled by said pliers on along the guide elements (4,5) (rails or belts), and descends against the internal face of the block (B). At a determined point which corresponds to the bottom of the foot (sole), the imprint (20, 21) thermosolder the part cut beforehand on the film of material thus cut.
• the person introduces a foot inside the space between the two faces of the U.
• a foot By any suitable means such as for example by pressure of the foot, one causes the displacement of the actual shaping elements constituted by the heat-sealing bars (15,16,17,18). These bars come out of the blocks (1,2) and therefore come to wrap the raw material on each side of the foot. A weld is therefore produced and cut along two lines, one corresponding to the front (foot), the other to the rear.
• an extensible element such as for example an elastic tape or wire (27), advantageously self-adhesive, which makes it possible to tighten around the user's leg.
• the waste is eliminated, for example by suction through holes provided at the base of the base. Additional means, such as for example a system with compressor cylinders and / or heat treatment can be provided in this base to compact said waste.
• Additional means such as for example a system with compressor cylinders and / or heat treatment can be provided in this base to compact said waste.
• Such a particularly simple design assembly therefore makes it possible to economically and effectively produce protective envelopes, perfectly sealed around the foot of a person.
• the invention is not limited to the embodiment described above. It could be envisaged to slightly modify the shape of the heat-sealing bars (15,16,17,18).
• such an installation may include means making it possible to spread said bars more or less relative to one another in order to be able to carry out an adjustment of the dimensions of the envelope formed as a function of the size of the shoes to be wrapped.

Landscapes

• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9396491

Family Applications (1)

Country Status (5)

Families Citing this family (5)

Family Cites Families (2)

• 1990
  • 1990-05-04 FR FR9005860A patent/FR2661638B1/fr not_active Expired - Fee Related
• 1991
  • 1991-04-30 WO PCT/FR1991/000356 patent/WO1991016829A1/fr not_active Application Discontinuation
  • 1991-04-30 CA CA 2060324 patent/CA2060324A1/fr not_active Abandoned
  • 1991-04-30 JP JP50973691A patent/JPH04506924A/ja active Pending
  • 1991-04-30 EP EP19910909762 patent/EP0480022A1/de not_active Withdrawn

Non-Patent Citations (1)

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