KR20190092594A - Molded bristle brushes containing spiral segments - Google Patents

Abstract

A molded bristle applicator having a cylindrical core arranged with a plurality of separate spiral bristle segments. According to an embodiment, all the separate spiral segments spiral in the same direction (ie clockwise or counterclockwise) about the axis of the core, or some spiral segments spiral in one direction and some in the opposite direction. Draw

Description

Molded bristle brushes containing spiral segments

Field of technology

FIELD OF THE INVENTION The present invention is in the field of cosmetic applicators and relates to shaped brushes in which bristles are arranged in spiral segments. Special bristle arrangements provide a new experience in the grooming and delivery of eyelashes and eyebrows.

Background

In this specification, we treat the terms "spiral" and "spiral" as synonyms. The properties of the spiral are well known in geometry. Spiral or spiral is a three-dimensional curve with a central, longitudinal axis. At any point on the spiral, the angle between the tangent and the axis is constant. We can talk about a cylindrical spiral with a constant radius of curvature, or a conical and spherical spiral with a continuous radius of curvature. The spiral pitch is the height of one complete spiral turn, measured parallel to the axis of the spiral. Double or triple helices consist of two or three (usually coincident) spirals sharing the same axis, which are varied by movement along the axis.

Brush heads having a cylindrical core have a central, longitudinal axis. Numerous arrangements of bristles are known on cylindrical cores, including spiral (ie helical) arrangements. The most common example of a spiral arrangement is a twisted wire core brush. In this classic brush, the bristles generally form one continuous spiral from one end of the bristle envelope to the other ("bristle envelope" is defined by the free ends of all the bristles in the brush head). 3D surface). Thus, the brush consists of bristles of exactly one spiral segment that always twists in the same direction, from one end to the other end of the brush.

In contrast, US Pat. No. 6,341,913 discloses a twisted wire core brush in which a first portion of the bristles spirals clockwise along the core and a second portion of the bristles spirals the core counterclockwise. The two bristle portions meet in the middle of the wire core to form one continuous bristle array from one end to the other end of the wire core. This is different from the invention in which the bristles coming from the core are arranged in a number of separate spiral segments.

Each of US Pat. No. 4,600,328 and US Pat. No. 5,611,361 disclose a dual-brush mascara applicator. Each brush comprises a twisted wire core with a spiral arrangement of bristles on which a bristles spiral clockwise, while on the second brush the bristles spiral counterclockwise. For each brush, the bristles are one continuous spiral extending from one end of the wire core to the other end. This differs from the present invention in which all the bristles come from a single core, some of which spiral in a clockwise direction, some of which spiral in a counterclockwise direction, arranged in a number of separate spiral segments.

summary

The present invention includes a shaped bristle applicator having a cylindrical core arranged with a plurality of separate spiral bristle segments. According to an embodiment, all the separate spiral segments spiral in the same direction (ie clockwise or counterclockwise) about the axis of the core, or some spiral segments spiral in one direction and some in the opposite direction. Draw

Description of the Drawings

1A is a front view of a first embodiment of a shaped brush that includes a helical segment.

1B shows the brush of FIG. 1A, partially configured.

2A is a front view of a second embodiment of a shaped brush that includes a helical segment.

2B shows the brush of FIG. 2A, partially configured.

3A is a front view of a third embodiment of a shaped brush comprising spiral segments.

3B shows the brush of FIG. 3A, partially configured.

4A is a front view of a fourth embodiment of a shaped brush comprising spiral segments.

4B shows the brush of FIG. 4A, partially configured.

5A is a front view of a fifth embodiment of a shaped brush that includes a helical segment.

5B shows the brush of FIG. 5A, partially configured.

6A is a front view of a sixth embodiment of a shaped brush that includes a helical segment.

6B shows the brush of FIG. 6A, partially configured.

7A is a front view of a seventh embodiment of a shaped brush that includes a helical segment.

FIG. 7B shows the brush of FIG. 7A, partially configured.

FIG. 7C is a perspective view of the brush of FIG. 7A, partially configured.

8A is a front view of an eighth embodiment of a shaped brush comprising spiral segments.

8B shows the brush of FIG. 8A, partially configured.

8C is a perspective view of the brush of FIG. 8A, partially configured.

9A is a front view of a ninth embodiment of a shaped brush comprising spiral segments.

9B shows the brush of FIG. 9A, partially configured.

9C is a cross-sectional view of the brush of FIG. 9A; Various bristle heights are evident.

10A-10E conceptualize the structure of one embodiment of a brush according to the present invention.

Detailed description of the invention

Next, although the distribution of the bristles of the cosmetic brush head will be discussed in terms of cylindrical spirals, the principles of the present invention can be applied to other types of spirals, such as conical or spherical.

With reference to FIG. 1A, the brush head 10 according to the invention comprises a molded core 1 and a plurality of separate spiral segments 3, 3 ′ of the shaped bristles 3a emerging from the core. The core comprises at least one straight section and, optionally, one or more curved sections. The straight section of the core is straight, except for some deviations due to manufacturing tolerances. The straight section of the core is defined by the longitudinal axis, A-A. This axis is also the spiral axis in which the spiral segments of the bristles are arranged on the straight sections of the core.

Throughout this specification, when describing the direction of the helical segment of the bristles 3a, the observer is directed longitudinally of the brush head from the proximal part to the free end of the brush head at the distal part, ie the end attached to the applicator stem. Looking down the axis. In this respect, each bristle segment can be twisted (or spiraled) clockwise or counterclockwise, but not both. In the figure, as shown in FIG. 1B, the bristle segment twisted clockwise is denoted by (3) and twisted counterclockwise is denoted by (3 ').

10A-10E are conceptual views of the structure of one embodiment of a brush head in accordance with the present invention. 10A shows the core 1 depending on the stem 2. The core is divided in half by the imaginary plane P1 indicating that the helical bristle segments 3 and 3 'will extend by half of the length of the core. FIG. 10B shows an imaginary line 1a which is a helical segment in which the axis is the longitudinal axis A-A of the core. Line 1a represents the position of the bristle segment 3 'of the first anti-clockwise spiral. 10B also shows an imaginary line 1b of the second helical bristle segment. Line 1b represents the position of the bristle segment 3 of the first clockwise spiral. The base of the bristles 3a will lie on these lines. From one end to the other end, each spiral line 1a or 1b makes a 1/3 turn about the core, even in the opposite direction, each line having the same pitch. Thus, in this embodiment, the helical lines 1a and 1b are mirror images of each other through the imaginary plane P1. In contrast, FIG. 10C shows the situation where the second helical curve 1b 'is ¼ turn about the core. In this case, the spiral lines 1a and 1b 'are not mirror images of each other. FIG. 10D shows bristles 3a formed along spiral lines 1a and 1b of FIG. 10B. When the process is repeated for a total of six times in the circumferential direction about the core, the result is the brush head shown in FIG. 10E. The number of changes in the arrangement of the spiral bristle segments 3 of the core 1 is non-limiting. Part of the fully formed brush head is shown in FIGS. 1A-9A. To better see the underlying pattern, FIGS. 1B-9B show a partially constructed brush head.

Feature 1: Spiral direction of the spiral segment of the bristle

Optionally, all helical bristle segments in the brush head can be twisted in the same direction. Alternatively, at least one bristle segment can be twisted clockwise, one counterclockwise. Clockwise and counterclockwise bristle segments can be arranged in multiple patterns. For example, some bristle arrangements allow all of the bristles 3a in the proximal half of the brush head to spiral in one direction (ie, clockwise or counterclockwise), and all the bristles in the distal half of the brush head in the opposite direction. (Ie, counter-clockwise or clockwise, respectively; see FIGS. 1B, 2B and 6B). This arrangement allows the user to easily make up her eyelashes without having to use only her dominant hand and / or reorient the applicator. Alternatively, FIGS. 3B, 4B, 5B, 7B, 8B and 9B illustrate embodiments in which the proximal and / or distal portions of the brush head support bristles that spiral in both directions. This arrangement may be better to coat all sides of the eyelashes with a sufficient amount of makeup.

Feature 2: longitudinal range of helical segment of bristles

The longitudinal range of any helical segment 3 may be less than, equal to or greater than half the length of the bristle envelope. A "bristle envelope" is a three-dimensional surface defined by the free ends of all the bristles in the brush head. The length of the bristle envelope is the distance measured along the longitudinal axis A-A from the proximal to distal bristles in the brush head. In some embodiments, all helical segments extend up to half the length of the bristle envelope. For example, FIGS. 1B, 2B, and 6B show helical bristle segments extending longitudinally at a distance equal to half the length of the bristle envelope, while spiral segments shorter than half the length of the bristle envelope are shown in FIGS. 4B, 5B, 7B, 8B and 9B. And it is not difficult to imagine an embodiment of a brush head in which some helical bristle segments extend longitudinally more than half the length of the bristle envelope.

Feature 3: pitch of spiral segment of bristle

As mentioned above, the spiral pitch is the height of one complete spiral turn, measured parallel to the axis of the spiral. The present invention includes not only an arrangement in which the spiral segments of all bristles have the same pitch, but also an arrangement in which all segments of the bristles do not have the same pitch. The density of the bristles can vary along the brush head by varying the pitch of the bristles spiral. For example, on sections of a core with a relatively large pitch, bristles will be thinner compared to sections of a core with a relatively small pitch. The effect can be seen in FIG. 6A where the bristles of the distal end of the brush head are less densely arranged due to the larger helical pitch.

Feature 4: Spiral segment of mirror-arranged bristles

The arrangement of the helical bristles 3a of some brush heads may be such that the proximal and distal halves of the brush head are mirror images of each other. This may occur when all the spiral segments 3 in the brush head have the same pitch and the twists of the spiral segments alternate along the axis. For example, in FIGS. 1A and 2A the segments of clockwise and counterclockwise spirals alternate and have the same pitch, whereas in FIG. 6A the segments of clockwise and counterclockwise spirals alternate but do not have the same pitch. .

Another bristle arrangement included in the present invention is that the bristle segments in clockwise and counter-clockwise spirals are dispersed from each other along the length of the core. For example, the clockwise helical bristle segment 3 may be alternating with the counter-clockwise helical bristle segment 3 ′ along the length of the core (FIGS. 7A, 8A, 9A).

In some embodiments, all bristles belong to either segments of the clockwise spiral or segments of the counter-clockwise spiral, but not both. In some embodiments, one or more bristles may belong to both segments of a clockwise spiral and segments of a counter-clockwise spiral. There are no bristles belonging to two or more spiral segments in the same direction (clockwise or counterclockwise). That is, the bristles segments twisted in the same direction (clockwise or counter-clockwise) do not cross each other; Preferably, they remain parallel.

As mentioned above, a common example of a brush head with an array of spiral bristles is a twisted wire core brush, consisting of bristles of exactly one spiral segment. Preferred embodiments of the invention consist of 2-50 spiral segments or parts thereof. For example, the brush head of FIG. 7A has 48 spiral segments or portions thereof; 8A it has 40 spiral segments or parts thereof; It has 28 spiral segments; 1A and 6A it has 12 spiral segments; It has 32 spiral segments; 2A it has twenty spiral segments.

In a single brush head according to the invention, not all bristles 3a need to be the same height or shape. 7A, 8A, and 9A show brush heads with bristles of various heights. The brush heads described herein are molded by standard molding methods, such as injection molding of one or more plastic or elastomeric materials. The rigid stem 2 for attaching to the handle can be molded integrally with the core 1. Alternatively, the proximal end of the core may have a hollow section for receiving a rigid stem element.

In some embodiments of the invention, the core 1 may comprise more than one cylindrical section, ie the core may be bent. In this case, a plurality of separate helical segments may be arranged in one or both cylindrical sections of the core. All of the features described above can be applied individually to each cylindrical section, thus increasing the number of variations of the invention and the usefulness of the brush head 10.

In some embodiments of the invention, the core 1 may comprise a curved section. The principles of the present invention can still be applied to curved sections by using the central hardness of the curved sections as the axis of the helical bristle segments. All of the above features can be applied.

Claims (9)

A cylindrical core 1 having a longitudinal central axis AA; And
A shaped brush comprising a plurality of helical segments 3, 3 ′ of the shaped bristles 3a emerging from the core 1, each helical segment being helically arranged about the longitudinal axis AA Head 10. 2. The molded brush head (10) according to claim 1, wherein all helical bristle segments spiral in the same direction about the longitudinal axis (A-A) of the core (1). The spirally bristle segment (3) according to claim 1, wherein some helical bristle segments (3) spiral in a direction about a longitudinal axis (AA) of the core (1), and the other helical bristle segments (3 ') A molded brush head (10) spiraling in the opposite direction about a longitudinal axis (AA) of the. 4. The spiral helical segment (3) according to claim 3, wherein all helical bristle segments (3) in the proximal half of the brush head (10) are helical in one direction, 3 ') is a shaped brush head 10 spiraling in the opposite direction. 4. The molded brush head (10) according to claim 3, wherein the proximal portion of the brush head (10) supports helical bristle segments (3, 3 ') that spiral in both directions. 2. The molded brush head (10) according to claim 1, wherein the longitudinal range of any helical bristle segment (3, 3 ') is less than half the length of the bristle envelope. 2. The molded brush head (10) of claim 1, wherein all helical bristle segments have the same pitch. 2. The molded brush head (10) of claim 1, wherein not all helical bristle segments have the same pitch. 2. The shaped brush head (10) according to claim 1, wherein the helical bristle segments (3, 3 ') are arranged such that the proximal and distal halves of the brush head (10) are mirror images of each other.

Images