FR2781554A1 - Aeration grill for cosmetics container has molded plastics perforated plate without direct through holes - Google Patents

Abstract

The cosmetics container ventilation grill has a perforated plate for an aeration grill for a box consists of blind holes (2,2') which respectively open out onto opposite sides of the plate (1). These blind holes communicate one with the other by a transverse window, which is common to each of the respective blind holes.

Description

Perforated plastic sheet and process for its manufacture

  The invention relates to a perforated plate made of material

  synthetic, such as a ventilation grille of a case 20 for cosmetic products.

  Such perforated plastic plates are well known in the art. However, they have a drawback in the case where they have to be decorated, which is generally done by spraying paint or lacquer. Indeed, in this case, the paint or lacquer

  crosses the perforations and can reach the environment of the plate, for example a mirror in the case of a case for cosmetic products. The present invention aims to eliminate this drawback.

  To this end, the plate according to the invention is characterized in that the perforations each consist of two blind recesses opening respectively on one face and the opposite face of said plate, said

  blind recesses communicating with each other through a transverse window common to the two recesses.

  The perforations of the plate according to the invention are therefore provided with baffles, which prevents the passage of any sprayed product, such as paint or lacquer. 5 Preferably, the recesses each have respectively a face of complementary shape to an adjacent face on the other, of course. Advantageously, said adjacent faces are planar. The invention also relates to a method for manufacturing the preceding perforated plate, characterized in that said plate is molded by injecting a synthetic material into a mold comprising a plurality of punches. integral with one part of the mold and a plurality of punches integral with another part of the mold, the

  punches of a part of the mold being arranged to be each, in the closed position of the mold, in contact, by a portion of a face, with a portion of a face of 20 shape complementary to a punch of the other part of the mold.

  The invention will be clearly understood on reading the

  Following description of an exemplary embodiment, with reference to the appended drawing in which:

  FIG. 1 is a schematic plan view, on a large scale, of a portion of a plate according to the invention incorporating a perforation and

  Figure 2 is a schematic sectional view along line II-II of Figure 1.

  The plastic plate 1 is provided with perforations, only one of which is shown in the drawing. Usually, these perforations are cylindrical in revolution and, therefore, allow spraying of paint or lacquer which can soil an object, such as a mirror, placed opposite the plate.

  when it constitutes for example a bottom of a case for cosmetic products.

  According to the invention, the perforations each consist of a blind recess 2 opening into a face 3 of the plate 1 and a blind recess 2 'opening into the face 3', opposite to the face 3, of the plate 1.10 The recesses 2 and 2 ', which are preferably cross-section

  transverse rectangular, square in the example shown, are in communication with each other by a common window 4 constituted by the common portion of their adjacent faces 5 and 5 '.

  The opening 2, 2 ′ therefore provides a chicane which opposes the crossing of a paint or a lacquer sprayed on the face 3 and / or the face 3 ′. 20 For the molding of the recesses 2 and 2 ′ , punches 6, 6 ′ are used, shown diagrammatically in bold dashed line in FIG. 2 and of section identical to that of the recesses 2, 2 ′ respectively. The punches 6, 6 'are respectively secured to a mold part 7, 7' from which they project over a height equal to the depth of

  the blind recess 2, 2 'respectively.

  Of course, the recesses 2, 2 ′, which can be of any shape, can also be different, the only obligation being that they have shaped faces

  complementary which are in the extension of each other thus forming a communication window.

Claims (1)

4 CLAIMS   1. Perforated plate of synthetic material, such as a ventilation grille of a shoemaker for cosmetic products, characterized in that the perforations each consist of two blind recesses (2,2 ') opening out   respectively on an opposite face (3) and the opposite face (3 ') of said plate (1), said blind recesses (2, 2') communicating with each other by a transverse window10 (4) common to the two recesses (2.2 ').   2. Perforated plate according to claim 1, characterized in that the recesses (2,2 ') comprise   respectively each a face (5) of complementary shape15 of a face (5 ') adjacent to the other recess (2,2').   3. Perforated plate according to claim 2, characterized in that said adjacent faces (5,5 ′) are planar. 4. Perforated plate according to claim 3, characterized in that said recesses (2,2 ′) have a   rectangular cross section, preferably square.   5. Method for manufacturing a perforated plate according to one of claims 1 to 4,   characterized in that said plate is molded by injecting a synthetic material into a mold comprising a plurality of punches (6) integral with one part (7) of the mold and a plurality of punches (6 ') integral with another part (7 ') of the mold, the punches (7) of a part (6) of the mold being arranged to be each, in the closed position of the mold, in contact, by a portion of a face,   with a portion of a face of complementary shape of a punch (7 ') of the other part (6') of the mold.