US3124244A

US3124244A - hopgood

Info

Publication number: US3124244A
Authority: US
Publication date: 1964-03-10
Anticipated expiration: 1981-03-10

Description

March 10, 1964 h. B. HOPGbOD 3,124,244

LIPSTICK CONTAINER OR THE LIKE Filed Aug. 9, 1960 2 Sheets-Sheet 1 INVENTOR. ROBERT B. HOPGOOD lax (Z7 i March 10, 1964 R. B. HOPGOOD LIPSTICK CONTAINER OR THE LIKE 2 Sheets-Sheet 2 Filed Aug. 9, 1960 SUPPLY AND CONTROL MEANS INVENTOR. ROBERT B. HOPGQOD BY ATTOR EY United States Patent M 3,124,244 LKPSTIK CONTAINER OR THE LIKE Robert B. Hopgood, Warwick, 11.1., assignor, by mesne assignments, to Nicholson File Company, Providence, KL, a corporation of Rhode Isiand Filed Aug. 9, 1969, Ser. No. 48,444 8 Claims. (Cl. 2,0656) My invention relates to an improved casing construction applicable to lipstick containers or the like of the rotary-propulsion variety.

It is an object of the invention to provide an improved device of the character indicated.

Another object is to provide an improved rotary-lipstick container construction characterized by extreme ease of action.

A further object is to provide an improved lipstickcontainer construction characterized by inherently less critical dependence on small tolerance limitations than is characteristic of present-day lipstick containers.

A still further object is to provide an improved rotarylipstick construction featuring a novel cam sleeve as a part thereof, wherein a given size of cam sleeve may inherently serve a plurality of lipstick-container diameters with equal facility and effectiveness.

Other objects and various further features of novelty and invention will be pointed out or will occur to those skilled in the art from a reading of the following specification in conjunction with the accompanying drawings. In said drawings, which show, for illustrative purposes only, preferred forms of the invention:

FIG. 1 is a longitudinal sectional view through a rotary lipstick container assembly embodying features of the invention;

FIGS. 2, 3 and 4 are perspective views to illustrate my novel method of fabricating the cam sleeve for the container of FIG. 1;

FIG. 5 is a fragmentary view in elevation, partly broken away and in longitudinal section and illustrating a modification of the container of FIG. 1;

FIG. 6 is a sectional view taken on the plane 6-6 of FIG. 5;

FIG. 7 is a perspective view of another form of container construction of the invention;

FIG. 8 is a sectional view in the plane 8-8 of FIG. 7;

FIG. 9 is a View in perspective, similar to FIG. 3 but illustrating a step in the method when applied to a construction as illustrated in FIGS. 7 and 8; and

FIGS. 10, 11 and 12 are views analogous to FIGS. 2, 3 and 4, respectively, to illustrate a further modification, certain of the fabricating apparatus being shown schematically in FIG. 10.

Briefly stated, my invention contemplates an improved lipstick-container construction featuring the use of thermoplastic material such as nylon, delrin, lexan, penton, polyethylene, and the like, in one of the two basic relatively rotatable tubular parts of the container. The plastic part is preferably so formed as to be inherently resiliently stressed in substantially continuous sliding contact with the adjacent surface of the other tubular member, this being contrary to conventional concepts of lipstick-container fabrication. In the forms to be described, the inner of the two rotatable members is of conventional metal construction, and the thermoplastic material is utilized in the cam sleeve cooperating therewith. The thermoplastic material of the one rotatable part is found, in conjunction with the metal of the other rotatable part, to develop virtually a self-lubricated relation, assuring ease of action. Various forms of the invention will be described.

In FIG. 1, I illustrate application of the invention to 3,124,244 Patented Mar. 10, 1964 a more or less conventional container, comprising an inner tubular member or shell 10 having an enlarged base 11 closed by a snap button 12 which (with base 11) may constitute the base operating handle of the assembly. The inner member or shell 10 may include a cam element such as the conventional straight slot 13 running essentially the full longitudinal extent of the shell, but which preferably terminates at or near a circumferential bead 14.

Slidable within the inner shell 10 is a carrier 15 for lipstick material (not shown), said carrier being provided with outwardly extending cam-follower means 16 received in the cam slot 13 and projecting also into another cam slot 17 on an outer rotatable member or sleeve 18. To conform with conventional practice if the slot 13 is straight, then the cam slot 17 in the sleeve 18 may be helical or spiral.

To complete the basic assembly, an outer casing 19 surrounds the inner shell 10 and sleeve 18, all except for the base portion 1112. The casing 19 is of course open at 29, to permit outward propulsion of lipstick carried by the carrier 15. A key or locking lug 21 is shown formed inwardly from the material of the casing 19 and in engagement with a localized opening or aperture 22 in the sleeve 18. The upper end of the casing 19 receives bearing support from the bead 14, and the lower end 23 thereof may receive bearing support from a step 24 in the base portion 11 of inner shell 10. Thus, upon rotation of the base portion 10-12 with respect to the casing 19, the cams 13-17 cooperate with the cam-follower means 16 to propel and retract the carrier 15 within the inner shell 10 in the customary manner. A removable closure cap 30 surrounds casing 19 and has frictional engagement therewith, as at bumps or nibs 30'.

In accordance with the invention, the sleeve member 18 is of a material different from that of the inner shell 10, and these materials are so related to each other that in the presence of continuous resilient sliding contact between these members a self-lubricated action is achieved. Preferably, the inner shell 10 is of conven tional metallic construction, e.g., of brass, steel or the like, and the sleeve 18 is of a thermoplastic material, such as one of those noted above, having effectively a self-lubricated sliding co-action therewith; of these materials, I have a present preference for nylon or delrin.

In order to achieve the continuous resiliently loaded sliding contact between sleeve 18 and inner shell 10, I prefer that sleeve 18 shall be circumferentially continuous except for a slight discontinuity which enables the sleeve 18 to adapt itself to small variations in outer diameter of the inner shell 10. A novel method of suitably forming the sleeve 18 to meet this requirement is illustrated in FIGS. 2, 3 and 4.

As illustrated in FIG. 2, the sleeve 18 is made from tubular plastic stock which may either be extruded and fed as a continuous tube or, as in the form shown, may

be cut off into lengths such as the length 18 shown in FIG. 2, such length being the ultimate finished length needed for assembly as in FIG. 1. The tubular material 18' is longitudinally slitted, as at 25, to define the discontinuity mentioned above. The piece 18' may then be flattened as illustrated in FIG. 2, pressure being applied along the edge 25'25", as indicated by downward arrows, to hold the piece 18' flat against a suitable table (not shown). In this flattened position, the spiral slot 17 and aperture 22 may be blanked by conventional piercing tools; and, having completed the piercing operation, the piece may be released and allowed to resume its tubular shape. This resumed tubular shape will be of the general appearance of FIG. 2 but, of course, with the spiral slot 22 formed therein.

Alternatively, and as also suggested by FIGS. 3 and 4, the extruded continuous tube may be continuously slitted at 25, then flattened, blanked, cut-off, and allowed to reform into a tubular length. This method avoids any need to handle cut-off tubing when blanking the spiral cam 17.

As indicated above, I prefer that when assembled on the outer surface of the inner shell 10 there shall be a continuous resilient pressure of the sleeve 18 on the shell 10. This is achieved by forming the piece 18 from tubular stock having a nominal internal diameter which is something less than the outer diameter of the surface on shell 1% to be engaged thereby, so that upon assembly to shell 19 the edges 25'25" will be separated. In FIG. 4, I illustrate by separation of edges 25'--25" a typical separation which will suffice for purposes of achieving the light resiliency alluded to.

In FIG. and FIG. 6, I show a slightly modified form wherein the inner shell may be exactly the same as described for FIG. 1 but wherein for decorative or other reasons the outer casing 30 is provided with fluting or other non-circular formations 31 which may additionally serve the function of developing a keying engagement with the plastic sleeve member 32. Thus, the cam member or sleeve 32 may be generally corrugated in shape, again preferably resiliently loaded to ride the outer surface of inner shell 16 and, of course, provided with the cam slot at 17, as for the case of FIGS. 1 to 4. The bore of sleeve 32 may be smooth, as shown, so that cam follower engagement with slot 17 may be uniformly smooth. Retention of the casing 30 may be achieved by an inwardly struck lug 33 formed out of the casing 30 and having snap engagement with the bead 14 upon assembly.

In FIGS. 7, 8 and 9, I illustrate a further form of the invention featuring the plastic cam sleeve of the invention and again adapted to a non-circular casing configuration. The outer casing in FIGS. 7 and 8 is shown at 35 to be of generally square or rectangular prismatic shape and to receive plastic sleeve member 36 therewithin. Preferably, a slight clearance exists between sleeve 36 and casing 35, and there is again the resiliently stressed frictional relation between sleeve 36 and the inner shell 10. The discontinuity or clearance 37 suggests that, initially, the sleeve 36 may be of solid continuous rectangular prismatic outer form but with a circular bore and slitted at 37 to permit adaptability to variations in outer diameters of the inner shell 10. The necessary shape for such sleeves 36 may be precast or it may be extruded and slitted by conventional means, and in FIG. 9 I suggest (in a manner similar to that employed in FIG. 3) that the slitted sleeve 36 may be flattened for performing the blanking operation to produce the spiral slot 17'. After blanking, the piece 36 may be released to assume its unstressed shape, in readiness for assembly to the inner shell 10.

In FIGS. 10, 11 and 12, I illustrate a further embodiment of the invention, for the situation in which the cam sleeve 18", when flat, is of parallelogram shape, the cam slot 17 thereof being defined by opposed sides 18a18b of the parallelogram. Starting with continuous tubular stock, as shown being fed from left to right in FIG. 10, a knife blade 39 continuously makes a spiral cut 17", which ultimately becomes the spiral cam slot. The tubular stock may be continuously rotated at a proper speed related to the feed speed, for a stationary knife 39 to develop the desired helical advance angle for out 17". Alternatively, and as suggested in FIG. 10, the tubular stock is fed longitudinally without rotation, and the knife blade 39 is carried by a ring 42 which is suitably journaled (by means not shown) about the axis of the tubular stock. The blade 39 may be set at a correct angle to the axis of the tubular stock to develop the desired spiral cut by merely allowing ring 42 to rotate freely; however, in the form shown, a preference is indicated for a positive rotary drive to ring 42,

as by motor 43 and gear means 44, controlled by means 45 responsive (via friction wheel 46) to the longitudinal feed speed of the tubular stock. The slitted tubular stock may be flattened by applying pressure at spiral edges Ida-18b, for blanking to define hole 22 and external dimensions, such as the edges 4041 (FIG. 11). Upon subsequent release, the tubular shape is resumed, except that upon assembly to inner shell 10, and with proper choice of dimensions, the resilient wrapping of sleeve 18" on shell 10 will occur for a desired ultimate slot gap between spiral edges 18a--18b, as indicated at 17" in FIG. 12.

In operation, containers of my invention are found to be remarkably free from rattle and are extremely smooth running. It makes little difference what the initial unstressed diameter of the tubular stock from which the

sleeve

18 or 32 or 36 is formed, as long as this unstressed diameter is equal to or less than the outer diameter of the member on which it is to ride, thus assuring the constant and continuous frictional engagement characteristic of the invention. Furthermore, as long as this condition is met, it makes little difference how much larger the diameter of the inner shell It) may be than the unstressed bore of the

sleeve

18, 32 or 36, so that tolerance requirements on this dimension may be substantially relaxed; in fact, I have found that a given sleeve size may be used in conjunction with a plurality of standard inner-shell diameters, all with equal effectiveness. Incidentally, an advantage of such constructions is that cam-follower engagement with the cam sleeve may be assured at all times, inasmuch as there is no clearance between these parts. Additionally, the existence of light frictional contact between these parts means inherent resistence to displacement of loaded carriers 15 in the presence of vibration during shipment.

While I have described the invention in detail in connection with a lipstick container and for the preferred forms illustrated, it will be understood that it may be otherwise applied and that modifications may be made within the scope of the invention as defined in the claims which follow.

I claim:

1. In a lipstick container, two relatively rotatable tubular members and a carrier cup slidable within the inner of said tubular members and including outwardly projecting cam-follower means, cam means on said tubular members cooperating With said cam-follower means and effective upon relative rotation of said tubular members to advance or retract said cup, said tubular members being of different materials one of which is a self-lubricated thermoplastic in substantially circumferentially continuous pressure contact with the other said tubular members, whereby uniform mutual support of said tubular members is achieved.

2. In a lipstick container, a metal inner tubular member having a cam slot, an outer tubular member of selflubricated thermoplastic material in circumferentially continuous pressure contact with the outer surface of said inner tubular member and having a cam slot therein, said cam slots being divergent with respect to each other, and carrier means including a cam follower within said inner tubular member and projecting into said slots.

3. In a lipstick container, a metal inner tubular member having a cam slot, an outer tubular member of selflubricated thermoplastic material in circumferentially continuous pressure contact with the outer surface of said inner tubular member and having a cam slot therein, said cam slots being divergent with respect to each other, carrier means including a cam follower within said inner tubular member and projecting into said slots, and an outer casing locked against rotation with respect to said outer tubular member and in substantially circumferential clearance relative therewith.

4. A lipstick container according to claim 3, in which said outer casing is in radial clearance relation with said outer tubular member.

5. In a lipstick container, an inner tubular member having a cam slot therein, a carrier slidable within said inner tubular member and including a cam-follower means projecting through said slot, and a cam sleeve of self-lubricated thermoplastic carried on the outer surface of said inner tubular member in sliding frictional circumferentially continuous contact therewith, said sleeve including a cam slot receiving said cam follower means and extending circumferentially of said inner member but short of the full circumferential extent thereof and being in resiliently loaded compression engagement with said inner member, said cam slots being divergent with respect to each other, the unstressed internal diameter of said sleeve prior to assembly to said inner member being less than the outer diameter of the inner member surface to be engaged thereby, whereby substantially continuous resilient frictional engagement is developed between said members.

6. A device according to claim 5, in which said sleeve is of uniform thickness.

7. A device according to claim 5, in which said sleeve is of thickness varying as a function of angle about the axis of said container.

8. A container according to claim 7, and including an outer casing surrounding said sleeve and having a noncircular inner surface conforming generally to the adjacent non-circular surface of said sleeve, whereby said casing and sleeve are effectively keyed to each other for purposes of rotating said sleeve by way of said casing.

References Cited in the file of this patent UNITED STATES PATENTS 2,074,016 Coryell Mar. 16, 1937 2,099,488 Kasdan Nov. 16, 1937 2,284,162 McKnight May 26, 1942 2,302,473 Reichenbach Nov. 17, 1942 2,432,884 Maynard Mar. 16, 1948 2,763,895 Iesersek Sept. 25, 1956