MULTIPLE COLOR MARKER

Abstract

Provided herewith is a marker that has multiple colors and retracts and seals the ink reservoirs. Also provided is a method of selecting a color.

Claims

1. A valve, comprising: a first valve portion made from a first material, the first valve portion including a flexible slit opening and a flexible body; and a second valve portion made from a second material, the second valve portion including a body including a first opening at a first end and a second opening at a second end opposite the first end, the flexible body including an outer seal to seal on the first end of the body; the flexible body connecting the body to the slit opening; and a third valve portion made from a third material, the third valve portion including an outer seal to seal on the second end of the body and an inner seal.

2. The valve of claim 1, the second valve portion further comprising more than one inner seals.

3. The valve of claim 1, wherein the third valve portion inner seal extends to the slit opening.

4. The valve of claim 2, wherein the second valve portion inner seal(s) extend to the slit opening.

5. The valve of claim 1, wherein the first material is a thermoplastic elastomer.

6. The valve of claim 1, wherein the third material is a thermoplastic elastomer.

7. The valve of claim 1, wherein the first material is a silicone rubber.

8. The valve of claim 1, wherein the third material is a silicone rubber.

9. The valve claim 1, wherein the second material is a thermoplastic material.

10. The valve of claim 9, wherein the thermoplastic material is selected from polypropylene, polyethylene, high density polyethylene, and mixtures thereof.

11. A retractable marker, comprising: a housing including a first opening on one end and a second opening at a second end opposite the first end; a valve disposed in the housing and comprising a first valve portion made from a first material, the housing forming a second portion made from a second material, and a third valve portion made from a third material; the first valve portion including a flexible slit opening and a flexible body connecting the housing to the slit opening towards the first opening of the housing, a third valve portion made from a third material, the third valve portion including an inner seal and an outer seal to seal on the body towards the second end of the housing; and an ink reservoir in the housing; and a nib subassembly with a writing tip in fluid communication with the reservoir; wherein the nib subassembly is slidable between a retracted position in which the writing tip is inside the valve such that the flexible slit opening is closed and the inner seal on the third valve portion circumferentially seals around the writing tip to form a substantially sealed chamber; and a writing position where the writing tip is extended out of the opening of the housing and the flexible slit opening is in an opened position.

12. The marker of claim 11, further comprising one or more ink reservoirs and one or more nib subassemblies and the third valve portion including one or more inner seals.

13. The marker of claim 11, further comprising a knock-type actuator, adapted to selectively place the marker in either the writing position or the retracted position.

14. The marker of claim 12, further comprising a selector-type actuator, adapted to selectively choose a nib subassembly from the marker in either the writing position or the retracted position.

15. The marker of claim 11, the nib subassembly further comprising a nib, wherein the nib is an extruded plastic tube.

16. A method of selecting a writing tip from a multiple writing tip marker, comprising: a user choosing a writing tip by pressing a first actuator, the actuator moving a first writing tip assembly including a nib, and ink reservoir, the nib exiting a valve assembly through a slit opening, extending into a writing position, the user choosing a different writing tip by pressing a second actuator, the first actuator retracting the first writing tip assembly and the second writing tip exiting the valve assembly, extending into a writing position; and the user choosing to retract all writing tips by partially pressing an actuator of a retracted writing tip assembly and the extended writing tip retracting by the actuator.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is perspective side view of a retractable multiple tip marker with the tips in a retracted position.

[0009] FIG. 2 is a perspective side view of the retractable multiple tip maker of FIG. 1 with one of the tips in an extended writing position.

[0010] FIG. 3 is a perspective side view of the retractable multiple tip marker of FIG. 1 with the tips in a retracted position. The marker body is not shown for clarity.

[0011] FIG. 4 is a perspective side view of the retractable multiple tip marker of FIG. 2 with one of the tips in an extended writing position. The marker body is not shown for clarity.

[0012] FIG. 5 is a cross-sectional view of the retractable multiple tip maker of FIG. 1, taken along line 5-5 in FIG. 1, with the marker in the retracted position.

[0013] FIG. 6 is a cross-sectional view of the retractable multiple tip marker of FIG. 2, taken along line 6-6 in FIG. 2, with the marker in the extended writing position.

[0014] FIG. 7 is a bottom side view of the retractable multiple tip marker of FIG. 1.

[0015] FIG. 8 is a top side view of the retractable multiple tip marker of FIG. 1.

[0016] FIG. 9 is a cross-sectional view of the retractable multiple tip maker of FIG. 1, taken along line 9-9 in FIG. 1, with the marker in the retracted position.

[0017] FIG. 10 is an isometric view of an actuator as shown in FIG. 1.

[0018] While the devices and methods described herein are susceptible to various modifications and alternative constructions, certain illustrative embodiments have been shown in the drawings and will be described below in detail. It should be understood, however, that there is no intention to limit the disclosure to the specific embodiments disclosed. On the contrary, the intention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the disclosure.

DETAILED DESCRIPTION

[0019] As used herein, the singular forms a, an and the are intended to include the plural forms as well, unless the context clearly indicates otherwise. Additionally, the use of or is intended to include and/or, unless the context clearly indicates otherwise.

[0020] Referring now to FIGS. 1 and 2 of the drawings, a marker 100 with a writing end 140 and an actuation end 160 is shown. The marker 100 includes a body 110 and actuators 130, 134, and 138. As shown, the body 110 includes a frame 120 that can be secured or snap fit together at a joint 168. The frame 120 includes frame ribs 124 and 128. The body 110 includes an opening 144 at the writing end 140 through which a writing tip nib 150 can extend and retract between a retracted position as shown in FIG. 1 and a writing position as shown in FIG. 2. The actuators 130, 134, and 138 are disposed through the frame 120 and frame ribs 124 and 128 in the actuation end 160. The user depresses and the actuators 130, 134, and 138 to alternate the marker 100 between the writing positions and the retracted positions.

[0021] Referring now to FIGS. 3 and 4, a side view of the marker 100 is shown with the body 110 hidden from the view for clarity. FIG. 3 depicts the retracted position, while FIG. 4 depicts an extended writing position. Disposed within the marker 100 are a slit valve 230, nibs 150, 153, and 157, and tubes 151, 154, and 158. The tubes 151, 154, and 158 surround the nibs 150, 153, and 157. FIG. 4 depicts the slit valve 230 in an open state with tube 151 passing through it and slit valve flaps 232 in an open state. The tubes 151, 154, and 158 pass through a lobe seal 180 and platform 190. Springs 170, 174, and 178 surround the tubes 151, 154, and 158 and are captured by the platform 190 on a first end and the reservoirs bodies 210, 214, and 218 on the second end. The platform 190 includes a hook feature 191 to securely attach to the body 110. The body 110 includes an undercut feature 192 to receive the hook feature 191. Tubes 151, 154, and 158 are securely attached to reservoir bodies 210, 214, and 218. Reservoir bodies 210, 214, and 218 are securely attached to shafts 220, 224, and 228. Shafts 220, 224, and 228 are freely surrounded by and bare against actuators 130, 134, and 138 in the actuation end 160. Actuators 130, 134, and 138 include shoulders 132, 136, and 139 that bear against the frame 120. Actuators 130, 134, and 138 bear against frame ribs 124 and 128. The frame 120 includes a lower rib 122 that includes snap-fit features 123 to attach to the body 110 in FIG. 1. The frame 120 includes an upper slot 121 for the actuators 130, 134, and 138 to slide in a linear manner in the direction of the length of the upper slot 121. The slit valve 230 is shiftable from a closed position shown in FIG. 3 to an open position shown including a first nib 150 and a first tube 151 protrude through the slit valve 230 in FIG. 4.

[0022] Referring now to FIGS. 5 and 6, section views 5-5 from FIGS. 1 and 6-6 from FIG. 2 of the marker 100 are shown. FIG. 5 depicts the retracted position, while FIG. 6 depicts a writing position. The marker body 110 is securely attached to the slit valve 230. The marker body 110 is securely attached to the platform 190. The platform 190 is securely attached to the lobe seal 180. The actuators 130, 134, and 138 include shoulders 132, 136, and 139 that bear against the body 110. The frame 120 includes a lower rib 122 that includes snap-fit features 123 to attach to the body 110.

[0023] Referring now to FIGS. 7 and 8 of the drawings, top and bottom views of the marker 100 with the writing end 140 and an actuation end 160 are shown. The marker 100 includes a body 110 and the actuators 130, 134, and 138. As shown, the marker 100 includes a frame 120. The frame 120 includes frame ribs 122, 124, and 128. The body 110 includes an opening 144 at the writing end 140. The actuators 130, 134, and 138 are disposed through the frame 120 and frame ribs 122, 124, and 128 in the actuation end 160. The slit valve 230 includes slits 234. In one embodiment, the slit valve 230 as shown in FIG. 7 contains slits 234 in the shape of three equally spaces slits. In other embodiments, the slit valve 230 contains slits 234 in the shape of a single straight line slit, equally spaced lines or cross shape, and more than four equally spaced slits. The slits 234 are sufficiently thin to maintain an air tight seal.

[0024] Referring now to FIG. 9, a section view 9-9 from FIG. 1 of the marker 100 is shown. The marker body 110 is circumferentially sealed to the lobe seal 180. The lobe seal includes inner lobe seals 182, 184, and 188 to allow the tubes 151, 154, and 158 to pass through. The inner lobe seals 182, 184, and 188 circumferentially seal around the tubes 151, 154, and 158.

[0025] Referring now to FIG. 10, an isometric view of one of the actuators 130 is shown. The actuator 130 includes snap hook upper 131 and snap hook lower 133 flexibly attached to the actuator 130. The actuator shoulder 132 is also shown.

[0026] The nibs 150, 153, and 157 extend from the writing end 140 back through the tubes 151, 154, and 158 to the reservoir bodies 210, 214, 218 such that they are disposed to permit transport of ink stored in the reservoir bodies 210, 214, 218 to the writing end 140. The nib tubes 151, 154, and 158 can be made of metal or plastic and provides strength to the nibs 150, 153, and 157 such that they do not buckle when a user applies pressure during writing. The nib tubes 151, 154, and 158 further seal the ink between the nibs 150, 153, and 157 and the reservoir bodies 210, 214, 218. The reservoir bodies 210, 214, 218 in this example are a conventional capillary reservoir. A free ink reservoir with a capillary buffer to store the excess ink could also be used. The nibs 150, 153, and 157 can be an extruded plastic tube with a single channel extending the length of the nibs 150, 153, and 157. Such nibs can be made from a homopolymer or a copolymer, and more specifically, a polyacetal homopolymer or a polyacetal copolymer. A nib porosity of greater than about 15% has been found to be effective. A nib porosity of greater than about 25% is advantageous. Alternatively, the valve could be used in combination with fibrous nibs comprising nylon, acrylic, or polyester fibers.

[0027] The springs 170, 174, and 178 bias the reservoir bodies 210, 214, and 218 away from the platform 190. Under the biasing force of the springs 170, 174, and 178, which pushes reservoir bodies 210, 214, and 218 toward the actuation end 160, the slit valve 230 remains closed as shown in FIG. 3 and creates a substantially air tight seal.

[0028] The frame 120, actuators 130, 134, and 138, and shafts 220, 224, 228, when coupled as shown in FIGS. 5 and 6, provide a well-known selector-type of writing utensil actuation system. As is known, by pressing a first one of the actuators 130, 134, or 138, the actuating system alternatingly places one of the nibs 150, 153, or 157 in the writing position shown in FIGS. 2, 4, and 6. By partially pressing a second one of the actuators 130, 134, or 138 the actuating system places a first one of the nibs 150, 153, or 157 in the retracted position. By fully depressing the second one of the actuators 130, 134, or 138 the actuating system places a second one of the nibs 150, 153, or 157 in the writing position. While a selector-type actuator is shown herein, other types of actuator systems can be employed. For example, a twist-type actuator can be used. In this embodiment, the user twists the frame 120 relative to the body 110 to actuate the nibs 150, 153, or 157. Also for example, a knock-type actuator can be used. In this knock-type actuator, a user repeatedly presses the actuator to alternate between that extended writing position and the retracted position.

[0029] In the writing position shown in FIG. 2, a user has activated the actuation system to push the shaft 224, reservoir 214, tube 151, and nib 150 toward the writing end 140 of the marker 100 by extending through the slit valve 230. In the retracted position, the nibs 150, 153, and 157 remain in an air tight volume created by the slit valve 230, body 110, and lobe seal 180. In one embodiment, the location of the slit valve is proximal to the writing end opening 144. In another more preferred embodiment as shown in FIG. 5, the slit valve location is a distance from the opening 144 to protect the valve. In one embodiment, the lobe seal 180 is a distance from the slit valve 230 as shown in FIG. 5. In another embodiment, the lobe seal 180 is proximal to the slit valve 230 to minimize the air-tight volume to decrease nib dry out.

[0030] Additionally, the slit valve 230 can be used in combination with otherwise conventional ball point pens.

[0031] The lobe seal 180 is made from a material and the platform 190 is made from a different material. The lobe seal 180 material forms an air-tight seal with the body 110, and the platform 190 material forms a structural support for the lobe seal 180. The platform 190 structurally attaches to the body 110 by means of a hook feature 191. The platform 190 and lobe seal 180 are inserted into the body 110 on the actuator end and the hook feature 191 snaps into the undercut feature 192 in body 110.

[0032] As explained in further detail below, however, the material construction of these components may be varied in accordance with the teachings of the present disclosure.

[0033] The slit valve 230 can be manufactured in a two-step injection molding process, also known as two-shot molding or over molding. In a first step, the body 110 can be injection-molded to form the components that support the slit valve 230. Then the slit valve 230 material can be injection molded into the body 110. This sequence of the flow of the first material 110 during injection is but one example, and other sequences could also be used. This sequence of injection molding creates an air tight seal and structural attachment between the slit valve 230 and the body 110.

[0034] The combination of two materials allows advantageous properties of each material to be used in the slit valve 230 and in the body 110.

[0035] The body 110 can be a relatively hard thermoplastic material such as polypropylene (PP), and the slit valve 230 material can be a flexible polymer such as liquid silicone rubber (LSR), thermoplastic vulcanizate (TPV), or thermoplastic elastomer (TPE). Because PP, LSR, TPV and TPE can take many chemical formulations, the two ultimately selected materials should be chemically compatible such that they are able to be molded into a single part on a single molding press. The body 110 material should provide moldability, vapor barrier properties, and low cost. The slit valve 230 material should have compatibility with the body 110 material to ensure a good bond between the two during the molding process, high lubricity to minimize dynamic friction, and a durometer in the range of about 20 A-40 A, preferably 25 A-35 A, or more preferably about 30 A to provide structural stability while being soft enough to provide effective seals. Other thermoplastic materials may also be used for the body 110 material, including polyethylene, HDPE, Nylon, PVC, etc., provided that they satisfy the necessary moldability, vapor barrier properties, and cost considerations. A variety of LSR's, TPE's and TPV's can be used for the slit valve 230 material, provided that they satisfy the necessary molding and sealing characteristics.

[0036] The lobe seal 180 can also be manufactured in a two-step injection molding process, also known as two-shot molding or over molding. In a first step, the platform 190 can be injection-molded to form the components that support the lobe seal 180. Then the lobe seal 180 material can be injection molded into the platform 190. This sequence of the flow of the platform 190 during injection is but one example, and other sequences could also be used. This sequence of injection molding creates an air tight seal and structural attachment between the lobe seal 180 and the platform 190.

[0037] The combination of two materials allows advantageous properties of each material to be used in the lobe seal 180 and in the platform 190.

[0038] The platform 190 can be a relatively hard thermoplastic material such as polypropylene (PP), and the lobe seal 180 material can be a flexible polymer such as liquid silicone rubber (LSR), thermoplastic vulcanizate (TPV), or thermoplastic elastomer (TPE). Because PP, LSR, TPV and TPE can take many chemical formulations, the two ultimately selected materials should be chemically compatible such that they are able to be molded into a single part on a single molding press. The platform 190 material should provide moldability and low cost. The lobe seal 180 material should have compatibility with the platform 190 material to ensure a good bond between the two during the molding process, high lubricity to minimize dynamic friction, and a durometer in the range of about 20 A-40 A, preferably 25 A-35 A, or more preferably about 30 A to provide structural stability while being soft enough to provide effective seals. Other thermoplastic materials may also be used for the platform 190 material, including polyethylene, ABS, HDPE, Nylon, PVC, etc., provided that they satisfy the necessary moldability, vapor barrier properties, and cost considerations. A variety of LSR's, TPE's and TPV's can be used for the lobe seal 180 material, provided that they satisfy the necessary molding and sealing characteristics.

[0039] In a multiple color marker writing instrument, the marker provides options to a user for writing in different colors. In one embodiment, a marker contains one or more colors contained within one housing. Advantageously, a marker capable of housing more than one color will allow a user to operate the marker by conveniently switching between the desired color. In addition, an apparatus implementing principles of the present disclosure will be capable of housing markers without causing dry-out of the ink.

[0040] The embodiment disclosed herein depicts a marker 100 containing three nibs 150, 143, and 157. In some embodiments the marker 100 can contain one or more, for example, 1, 2, 4, 5, or any other desired number of nibs.

[0041] Furthermore, the embodiment disclosed herein depicts the slit valve 230 in use with a marker 100. Those of skill in the art will see that the disclosed slit valve 230 can be used in other writing utensils, such as ball point pens, styluses, pencils, highlighters, permanent markers, dry erase markers, and paint pens. Further, the disclosed slit valve 230 may prove useful in correction fluid dispensers, adhesive dispensers, paint applicators, and other products completely outside of the writing implement field.

[0042] As various changes could be made in the above methods and compositions without departing from the scope of the present disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

[0043] All references cited in this specification are hereby incorporated by reference. The discussion of the references herein is intended merely to summarize the assertions made by the authors and no admission is made that any reference constitutes prior art. Applicants reserve the right to challenge the accuracy and pertinence of the cited references.