US3586451A - Writing instrument - Google Patents

Writing instrument Download PDF

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Publication number
US3586451A
US3586451A US783677A US3586451DA US3586451A US 3586451 A US3586451 A US 3586451A US 783677 A US783677 A US 783677A US 3586451D A US3586451D A US 3586451DA US 3586451 A US3586451 A US 3586451A
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United States
Prior art keywords
writing
pushbutton
drum
orifice
members
Prior art date
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Expired - Lifetime
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US783677A
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English (en)
Inventor
Raimondo Canton
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Individual
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Individual
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Publication date
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Publication of US3586451A publication Critical patent/US3586451A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/10—Mechanisms for selecting, projecting, retracting or locking writing units for selecting, projecting and locking several writing units

Definitions

  • the present invention relates to a writing instrument such as a pen or pencil having a tip which can be selected from within a housing by a pusher or other singleactuating means. It is concerned in particular with a ballpoint-pen with different colored points, each of which can be brought as desired, into a projected operating position by a sliding pusher positioned at the end of the said pen.
  • a particular object of the invention is to provide a simple and reliable means for bringing the selected point into alignment with an eccentric opening in the lower part of the body of the pencil or pen, and then to push it into its operative or retracted position by means of a single pushbutton.
  • pens or pencils with multicolored writing points having at their lower end an orifice which is eccentric with respect to the axis of the said pens or pencils, and which include a rotating barrel having radially disposed housings for the cartridges or refills equipped with the writing tips.
  • the known pens and pencils have been designed to give a rotary movement to the said barrel by means or a single rotating pushbutton mounted at the rear end of the pens or pencils in order to bring the selected writing point in alignment with the eccentric orifice, and to permit axial movement of the pushbutton to drive said point into a projected operating position where it projects outside the said orifice.
  • the retraction of the writing tip is also obtained by pressure on the pushbut- 1011.
  • the present invention proposes to avoid all these drawbacks.
  • the writing members are partially housed in a drum mounted slidably and rotatably in the body of the writing instrument in such a way that each of the said members is in contact with the or the several adjacent writing members.
  • the selected writing member is brought into operating position by an eccentric pusher maintained in the axis of the outlet opening of the writing instrument and the shaft connected to the pushbutton is mounted freely in the bore of the said eccentric pusher.
  • the bore of the body of the writing instrument has a circular shoulder spaced from the outlet of the writing instrument and opening aligned with the path of the selected writing member, said shoulder forming a stop for complementary shoulders on the remaining nonselected writing members near their writing tips.
  • the writing instrument is equipped with retracting means for the selected writing member comprising: a helical spring compressibly mounted between the sliding and rotating drum and a shoulder inwardly of the body of the said instrument, and a stop device on each writing member, the said stop device sliding in the drum and contacting an inner shoulder in the drum.
  • the projecting and retracting device of the selected writing member is essentially composed of a ring rotatably mounted on the shaft and integral with the pushbutton, said ring comprising on its periphery pins having laterally opposite slopes which cooperate with ramps located on either side of the said rotatable ring when the latter is pushed forward.
  • FIG. I is a cross-sectional longitudinal view of a ballpoint pen having two cartridges according to the invention.
  • FIG. 2 is a cross section taken along line 2-2 of FIG. 1.
  • FIG. 3 is a detailed view of the front end of the body of the pen according to FIG. 1.
  • FIG. 4 is a cross-sectional view taken along line 44 of FIG. 1.
  • FIGS. 5 and 6 show respectively the compression spring and the rotating sliding drum.
  • FIG. 7 shows the different elements constituting the projecting and retracting device for the writing members.
  • FIG. 8 is a longitudinal cross-sectional view of an embodiment of a ballpoint pen having four cartridges.
  • FIG. 9 is a perspective view of the separate elements of the retracting and push device for the cartridges shown in FIG. 8.
  • FIG. 10 is a perspective view of the drum and of the means for guiding the cartridges shown in FIG. 8.
  • FIG. I] is a view similar to FIG. 8, and shows one of the writing members in a projected operating position.
  • FIG. 12 is a cross section taken along line 12-12 of FIG. 11.
  • FIG. 13 is a schematic view of the retracting system shown in FIG. 8.
  • FIG. 14 is a partial view of a modification.
  • FIG. 15 is a perspective view of an example of an anchoring and guiding member which can be used in the modification of FIG. I4.
  • FIGS. 1 to 7 there is shown a writing instrument comprising a ballpoint pen comprising two cartridges equipped with writing points, said cartridges preferably containing different colored inks. It is evident, as will be seen later, that such a writing instrument could comprise a greater number of cartridges or writing means other than ball points.
  • the illustrated pen consists essentially of a body in two parts 1 and 2 which screw on one another.
  • the front part I has an outlet orifice Ia for the point of the selected cartridge, and this orifice has an axis which is off center with respect to the central axis of the body of the pen.
  • a drum 3 is rotatably and slidably mounted in the body, and more precisely in the half part 2, a drum 3 is rotatably and slidably mounted.
  • Cartridges Ca-Cb are housed partially by their rear ends in said drum and are positioned in tangential contact in order to reduce as much as possible the radial volume of the cluster of cartridges.
  • Drum 3 can slide axially on cartridges Ca-Cb or make them turn about the central axis of the pen. As can be visualized, this arrangement permits a very substantial reduction in the diameter of the writing instrument by comparison with various instruments heretofore proposed.
  • the rotation of the drum is controlled by rod 4 fastened by any known means to an actuating member such as a pushbutton 5 projecting at the rear end of the writing instrument.
  • an eccentric pusher 6 which has a suitable length and is mounted on shaft 4.
  • This eccentric pusher 6 is maintained permanently in axial alignment with the eccentric orifice la by washer 7 fixedly mounted in the body of the writing instrument and having an opening corresponding to the profile of the said pusher 6. According to this arrangement, rod 4 can freely turn in the bore of the eccentric pusher 6.
  • the eccentric pusher By pushing on the pushbutton 5, the eccentric pusher is brought forward and engages the rear end of the selected cartridge to push it in such a way that its writing tip will project outside the eccentric orifice la.
  • this shoulder lb is given a reduced width allowing the passage of the writing tip proper P, but forming a stop against which bears a shoulder Cl on said point at a predetermined distance from its writing tip.
  • This shoulder C] can be formed by the edge of the cartridge, in which the writing tip has been introduced.
  • Ring 8 has on its periphery pins or longitudinal flutes which are sloped at one end, and the ring 8 can be moved angularly under the pushing force of the peripheral pins on ring 9, mounted fixedly on the pushbutton 5, (FIG. 7).
  • the peripheral pins of ring 8 can either contact the bottom of a tooth (in the projected position) in the front part of a series of flutes 10 made inwardly to the rear part of body 2, or can contact the bottom of grooves made between the flutes 10 (corresponding to the retracted position of the writing tip).
  • drum 3 causes the ascent of the projecting device itself, the pins of ring 8 engaging in the bottom of grooves provided between flutes 10.
  • the fixing of the cartridges in drum 3 is effected, for example, by means of the device shown in FIG. 10.
  • drum 3 has in its front part a first chamber 3a receiving the rear extremity of the cartridges which are positioned in a cluster, or in tangential contact.
  • This chamber has a crossv section which corresponds to the number of cartridges with which the instrument is provided.
  • the guiding and stopping means are constituted by sleeves 12 (FIG. 10), which have sector-shape cross sections, said sleeves having cylindrical shanks 12a for fitting in the rear extremities of the cartridges.
  • each cylindrical shank 12a In order to consolidate the assembly, there has been provided a longitudinal slot or groove 12b in each cylindrical shank 12a, as shown in FIG. 15.
  • a shank 12a When a shank 12a has been introduced in the rear extremity of a cartridge, the elasticity of the material causes the radial expansion of the said shank.
  • This slot 12b allows also the passage of air, thereby facilitating the flow of the ink.
  • This device is essentially constituted by a ring 13 rotatably held on shaft 4 which is, in turn, mounted on pushbutton 5.
  • the said ring has on its periphery a suitable number of pins 13a having laterally oppositely inclined sides l3b-l3c. These sloping sides cooperate with ramps MAIS located on both sides of the said rotating ring 13, while the same is pushed to the front for the operation of the projecting and retracting device.
  • These sloping sides can be made at the end of rings or sleeves fixedly mounted at the rear part of the body of the pen. Preferably, however, these ramps are molded directly on the inner wall of the body of the pen.
  • ramps 14 and 15-15 have peaks which are shifted slightly with respect to one another.
  • drum 3 can be mounted with rod 4 which is itself mounted on pushbutton 5.
  • the fingers 4a are connected to the rear periphery of the said drum.
  • a writing instrument including a body portion having a pushbutton opening at its rearward end, and having an eccentrically disposed orifice at its forward end for slidably receiving a writing tip ofa selected one of a plurality of writing members held within the instrument, the combination comprising,
  • a pushbutton retractably mounted in said opening a drum rotatably and slideably mounted in said body portion for holding a plurality of writing members, means connecting said drum to said pushbutton for rotating said drum upon rotation of said pushbutton, said drum having a first chamber at its forward end for receiving the rear portions of said writing members and having a second chamber in communication with said first chamber, said second chamber having a cylindrical bore and having guiding means therein for guiding said writing members, and eccentric pusher means connected to said pushbutton for actuation thereby to push the writing tip of one of said writing members through said orifice when said one writing member is aligned with said orifice by rotation of said pushbutton and drum.
  • said guiding means comprises a sleeve having a sector-shaped cross section and a cylindrical shank.
  • a writing instrument including a body portion having a pushbutton opening at its rearward end, and having an eccentrically disposed orifice at its forward end for slidably receiving a writing tip ofa selected one of a plurality ofwriting members held within the instrument, the combination comprising,
  • a pushbutton retractably mounted in said opening a drum rotatably and slideably mounted in said body portion for holding a plurality of writing members, rotating means connecting said drum to said pushbutton for rotating said drum upon rotation of said pushbutton, and eccentric pusher means connected to said pushbutton for actuation thereby to push the writing tip of one of said writing members through said orifice when said one writing member is aligned with said orifice by rotation of said drum, wherein said eccentric pusher means has an axial opening therethrough and said rotating means includes a rod fixed to said pushbutton and received through said opening in said eccentric pusher means, said rod having means connected to its forward end for engaging and rotating said drum upon rotation of said fixedly connected pushbutton and rod.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Toys (AREA)
US783677A 1967-12-14 1968-12-13 Writing instrument Expired - Lifetime US3586451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT4140567 1967-12-14

Publications (1)

Publication Number Publication Date
US3586451A true US3586451A (en) 1971-06-22

Family

ID=11250259

Family Applications (1)

Application Number Title Priority Date Filing Date
US783677A Expired - Lifetime US3586451A (en) 1967-12-14 1968-12-13 Writing instrument

Country Status (10)

Country Link
US (1) US3586451A (de)
BE (1) BE725404A (de)
BR (1) BR6804865D0 (de)
CH (1) CH479409A (de)
DE (1) DE1812308A1 (de)
ES (1) ES361389A1 (de)
FR (1) FR1603517A (de)
GB (1) GB1217720A (de)
NL (1) NL6817774A (de)
OA (1) OA02954A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115015A (en) * 1977-04-11 1978-09-19 Ancos Co., Ltd. Retractable pen with internal tip seating
US4498047A (en) * 1982-11-29 1985-02-05 Custom Automation Designs, Inc. Integrated circuit mounting apparatus
US6705868B1 (en) 1998-03-18 2004-03-16 Purdue Research Foundation Apparatus and methods for a shape memory spring actuator and display
WO2009070166A1 (en) * 2007-11-29 2009-06-04 Mika Jeanne M Multi-purpose pen
US20110200380A1 (en) * 2006-05-26 2011-08-18 Youngtack Shim Multicolor writing tools and methods
CN105667125A (zh) * 2016-01-07 2016-06-15 天津大学 具有旋转笔芯库的笔孔偏心的多功能笔

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106427304B (zh) * 2016-11-22 2017-12-01 哈尔滨理工大学 一种用于绘制不同线宽和线型的机械制图画线笔

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115015A (en) * 1977-04-11 1978-09-19 Ancos Co., Ltd. Retractable pen with internal tip seating
US4498047A (en) * 1982-11-29 1985-02-05 Custom Automation Designs, Inc. Integrated circuit mounting apparatus
US20050069842A1 (en) * 1997-03-18 2005-03-31 Schleppenbach David A. Apparatus and methods for a shape memory spring actuator and display
US7018209B2 (en) 1997-03-18 2006-03-28 Purdue Research Foundation Apparatus and methods for a shape memory spring actuator and display
US6705868B1 (en) 1998-03-18 2004-03-16 Purdue Research Foundation Apparatus and methods for a shape memory spring actuator and display
US20110200380A1 (en) * 2006-05-26 2011-08-18 Youngtack Shim Multicolor writing tools and methods
US8322938B2 (en) 2006-05-26 2012-12-04 Youngtack Shim Multicolor writing tools and methods
US8534944B2 (en) 2006-05-26 2013-09-17 Youngtack Shim Multicolor writing tools and methods
US9254706B2 (en) 2006-05-26 2016-02-09 Youngtack Shim Multicolor writing tools and methods
EP3015280A2 (de) 2006-05-26 2016-05-04 Youngtack Shim Mehrfarbige schreibinstrumente und verfahren
WO2009070166A1 (en) * 2007-11-29 2009-06-04 Mika Jeanne M Multi-purpose pen
CN105667125A (zh) * 2016-01-07 2016-06-15 天津大学 具有旋转笔芯库的笔孔偏心的多功能笔

Also Published As

Publication number Publication date
ES361389A1 (es) 1971-02-16
BE725404A (de) 1969-05-16
DE1812308A1 (de) 1969-07-03
NL6817774A (de) 1969-06-17
OA02954A (fr) 1970-12-15
FR1603517A (de) 1971-05-03
BR6804865D0 (pt) 1973-01-18
CH479409A (fr) 1969-10-15
GB1217720A (en) 1970-12-31

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