Multicolour surface striping device

Abstract: A striping device for forming a plurality of surface stripes of two difference coloured materials on a base material. The striping device includes an insert (20) filled in a squeezable tube (10) which has an outlet (16). The insert includes a central cylinder (22) having a conical portion (28) integral therewith for forming a first space (A) between the conical portion and the tube and a second space (B) between the conical portion and the central cylinder. The spaces are filled with differently coloured striping material. Openings (44) are provided communicating the first space (A) with the central cylinder (22) and passageways (40) are provided communicating the second space (B) with the central cylinder (22). The central cylinder is provided with grooves (24a, b, c, d) for guiding the striping material.

Description: This invention relates to a multicolor surface striping device for a tube and, more particularly, to a surface striping device adapted to produce two different coloured stripes on a main product paste material. Various devices for producing stripes on paste or paste-like material have been developed. Primarily, the striped paste-like material is achieved by extruding two or more differently coloured paste materials through a single orifice so that the striped material extends throughout the entire extruded mass of material and is not surface striped. Further, the striping generally assumes a spiral pattern. To achieve these results, larger amounts of colouring materials or dyes must be employed as compared to surface striping. Additionally, to simultaneously extrude two or more materials, greater pressure must be employed rendering the product more difficult to use than with a single base material or a surface striped material. A surface striping device known in the art as the "Marraffino" striping device has been employed, but can achieve only one colour stripe. Another striping device is disclosed in GB-A-1 323 413 considered as the closest reference. The device according to that reference is designed to expel one striping content only with a main content actually separated therefrom by a movable barrier. A still another stripping device is disclosed in US-A-2 789 731. The device according to that reference is designed to expel two streams with a base paste, the stream pastes being stored in respective separate adjacent compartments. Specific features of the invention are set forth in the claims. It is, therefore, the primary object of the present invention to provide a surface striping device capable of achieving two different coloured surface stripes. It is a further object of the invention to provide a striping device which achieves two different coloured stripes on a base material requiring only a small amount of coloured material. Another important object of this invention resides in the provision of a striping device which is made of a single unitary member. According to an aspect of the invention a multicolour surface striping device for a tube having an outlet, comprises an insert in the said tube or adapted to be located in the said tube, the insert having a central cylinder and a cone, preferably at the top of the said central cylinder, defining in use a first space between the said insert and the said tube, a second space between the said cone and the said central cylinder, and a main product space within the said central cylinder, the said insert having aperture means therein communicating the said spaces. The invention also extends to a multicolour surface striping device for a tube having an outlet, comprising an insert in the said tube or adapted to be located in the said tube, the insert having a central cylinder in alignment with the said outlet, the said insert including a cone, preferably adjacent the top of the said central cylinder, defining in use a first space between the said insert and the said tube for receiving a first striping coloured material, and a second space between the said cone and the said central cylinder for receiving a second striping material, and a main product space within the said tube and extending into the said central cylinder, the said insert having aperture means communicating the said spaces with said central cylinder so that pressure on the said tube forces the main product material and both the said striping materials through the said outlet. The said aperture means preferably include openings communicating the said second space and the said central cylinder. The said aperture means preferably include passageways communicating the said first space and the said central cylinder. The said insert is preferably a single unitary member. The said tube preferably has a conical shoulder portion, and the said conical portion of the insert is spaced from the said shoulder of the tube. The said aperture means including openings communicating the said second space and the said central cylinder, are preferably provided as a pair of said openings in opposed relationship so that two opposed longitudinal stripes of the said first striping material will pass through the said outlet. The said aperture means including passageways communicating the said first space and the said central cylinder, are preferably provided as two opposed passageways for forming two opposed stripes of the said second striping material. Preferably the said central cylinder is provided with groove means for guiding the said striping materials. The invention also extends to a multicolour surface striping device for a tube having an outlet comprising an insert in the said tube or adapted to be located in the said tube, the insert having a central cylinder and a cone, preferably at the top of the said central cylinder, defining in use a first space between the said insert and the said tube, a second space between the said cone and the said central cylinder, and a main product space within the said central cylinder, the said insert having aperture means therein communicating the said spaces, and the said central cylinder having grooves therein in alignment with the said aperture means. The present invention envisions a striping device made from a single unitary member adapted to be inserted into a collapsible tube. The striping device includes a central cylinder having a conical portion integral therewith which is adapted to lie against the shoulder of the tube. The space between the conical member and the tube is filled with a first coloured striping material. A second differently coloured striping material is disposed in the space between said cylindrical portion and a central cylinder. A pair of openings communicates the space between the first space and the central cylinder and a pair of passageways are provided communicating the second space and the central cylinder. The central cylinder is provided with grooves for guiding the striping material to form longitudinal stripes on the base material. The invention may be put into practice in various ways and a specific embodiment will be described by way of example to illustrate the invention with reference to the accompanying drawings in which : Figure 1 is an exploded sectional view of the striping device; Figure 2 is a vertical sectional detail view of the striping device in the assembled condition; Figure 3 is a vertical sectional view taken along the line 3-3 in Figure 2; Figure 4 is a top plan view of the striping device; and Figure 5 is a horizontal sectional view taken along the line 5-5 in Figure 2. In the accompanying drawings, like reference numerals designate similar parts throughout the various views. The reference numeral 10 generally designates a collapsible tube made of metal or plastic. The tube 10 is adapted to be filled with paste or paste-like materials, such as cosmetics, including toothpaste or food stuffs, such as decorative frostings, prepared foods for hors d'oeuvres, and the like. The tube 10 has an elongated squeezable and deformable body 12, which is open at its bottom end until the tube 10 is filled. Thereafter it is crimped, heat sealed, sonic welded or otherwise closed at its bottom. The tube 10 is provided with a neck 13 which has external threading 14 adapted to receive a cap thereon for closing. The neck 13 is provided with an outlet bore 16 through which the paste material contained in the tube may be forced. Interconnecting the neck 13 with the body 12 is a tapered conical shoulder portion 18. In accordance with the concepts of the present invention, the striping device is achieved by the employment of a single unitary and integral insert generally indicated at 20 and made of plastic or metal, but preferably made from a suitable synthetic plastic material. The insert 20 includes a central cylinder 22 affording a central outlet duct and having an upper portion 23 adapted to extend into the neck 13 of the tube 10. The upper portion 23 is provided with four grooves 24a, 24b, 24c, 24d extending inwardly from the central bore 26 of the central cylinder 22, i.e. located in the inner surface of the said bore or outlet duct. Integrally connected to the central cylinder 22 is a downwardly tapered truncated conical portion 28 to which a cylindrical flange 30 is integrally appended. The tube 10 is adapted to be filled with three differently coloured paste materials. In the space marked "A" defined by the shoulder 18 of the tube, the upper tube wall 36 and the flange 30, there is disposed a first paste material having a first colour. (See Figure 3). A second coloured paste material is disposed in the space marked "B", which is defined by the inner surface of the flange 30, the outer surface of the central cylinder 22 and the inner surface of the truncated cylindrical portion 28. The interior of the tube 10 not occupied by spaces "A" and "B" forms space "C" having a main product material filled therein. The truncated conical portion 28 is spaced from the shoulder portion 18 permitting paste material from space "A" to pass through a pair of openings 44 forming aperture means which enable the paste material to pass from space "A" to the grooves 24a and 24c and thus onto the surface of the paste from the space "C" which passes up the bore 26 of the cylinder 22 (see Figure 2). As can be seen in Figure 3 aperture means in the form of passageways 40 are formed in the wall of the central cylinder just below the conical portion 28. This permits paste material from the space marked "B" to pass through the passageways 40 to the grooves 24b and 24d for longitudinally guiding such coloured paste material onto the surface of the paste from the space "C". It is to be noted that the sizing of the central cylinder is such as to prevent the truncated conical portion 28 from abutting the shoulder 18. In order to fill the device the spaces "A" and "B" are first filled and the main tube space "C" is then filled, then the bottom end of the tube is sealed and the striping device is ready for use. Squeezing of the tube 10 will force paste material in the space "C" upwardly filling the central cylinder 22 and extruding paste material through the central outlet duct or bore 26 and thence out of the tube outlet bore 16. Simultaneously, paste material in space "A" is forced in the direction of the arrow "Y" through the openings 44 (see Figure 2) into guiding grooves 24a and 24c to form longitudinally extending surface stripes on the main product paste material. Also, at the same time, material from space "B" is forced in the direction of the arrow "X" through passageways 40 (see Figure 3) into grooves 24b and 24d to form two other longitudinally extending surface stripes of contrasting colour from the first two recited longitudinal surface stripes and from the main product paste material. It is to be noted that the two pairs of surface stripes use far less colouring paste material than does striping wherein the differently coloured paste materials are not provided merely by surface stripes but extend throughout the thickness of the extruded material.

Claims: A multicolor surface striping device for a tube (10) having an outlet (16), an insert (20) in said tube (10) having a central cylinder (22) with a central bore (26) in alignment with said outlet (16), said insert (20) including a cone (28) defining a first concentric space (A) between said insert (20) and said tube (10) for receiving a first striping colored material, a second concentric space (B) between said cone (28) and said central cylinder (22) for receiving a second striping material, and a main product space (C) within said tube (10) and extending into said central cylinder bore (26), said insert (20) having aperture means (40, 44) communicating said spaces (A, B) with said central bore (26), said central cylinder (22) having inwardly extending grooves (24a, b, c, d) therein communicating with said apertures means (40, 44) so that pressure on said tube (10) forces the main product material in space (C) to enter said central bore (26) and to put pressure separately on each of said striping materials in the respective spaces (A, B) and to force each of said striping materials through said grooves (24a, b, c, d) and into said central bore (26) directing said first and second materials to form stripes on said main product material. A multicolor surface striping device according to claim 1, wherein said aperture means (40, 44) includes openings (44) communicating said first space (A) and said central bore (26). A multicolor surface striping device according to claim 1, wherein said aperture means (40, 44) includes passageway (40) communicating said second space (B) and said central bore (26). A multicolor surface striping device according to claim 1, wherein said aperture means (40, 44) includes openings (44) communicating said first space (A) and said central bore (26) and passageways (40) communicating said second space (B) and said central bore (26). A multicolor surface striping device according to claim 1, wherein said tube (10) has a conical shoulder portion (18), said conical portion (28) being spaced from said shoulder (18). A multicolor surface striping device according to claim 1, wherein said aperture means (40, 44) includes openings (44) communicating said first space (A) and said central bore (26) there being a pair of said openings (44) in opposed relationship so that two opposed longitudinal stripes of said first striping material will pass through said outlet (16). A multicolor surface striping device according to claim 1, wherein said aperture means (40, 44) includes passageways (40) communicating said second space (B) and said central bore (26) there being two opposed passageways (40) for forming two opposed stripes of said second striping material. A multicolor surface striping device according to claim 1, wherein said central cylinder (22) is provided with groove means (24a, b, c, d) for guiding said striping materials. A multicolor surface striping device according to claim 1, wherein there are four grooves (24a, b, c, d), two grooves (24a, 24c) guiding one striping material in said first space (A), while two other grooves (24b, 24d) guide the other striping material in said second space (B).

Inventors: MADDEN PATRICK JOSEPH, MADDEN, PATRICK JOSEPH
Applicants: COLGATE PALMOLIVE CO, COLGATE-PALMOLIVE COMPANY
Application year: 1989
Main classification: B65D35
IPC codes: B65D35, A61Q11, A61K8