US2627843A - Writing instrument - Google Patents

Writing instrument Download PDF

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Publication number
US2627843A
US2627843A US725609A US72560947A US2627843A US 2627843 A US2627843 A US 2627843A US 725609 A US725609 A US 725609A US 72560947 A US72560947 A US 72560947A US 2627843 A US2627843 A US 2627843A
Authority
US
United States
Prior art keywords
casing
writing
ink
ball
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US725609A
Other languages
English (en)
Inventor
Herman C Frentzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parker Pen Co
Original Assignee
Parker Pen Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL68827D priority Critical patent/NL68827C/xx
Priority to BE480018D priority patent/BE480018A/xx
Application filed by Parker Pen Co filed Critical Parker Pen Co
Priority to US725609A priority patent/US2627843A/en
Priority to GB2697/48A priority patent/GB648605A/en
Priority to CH265864D priority patent/CH265864A/de
Priority to FR977857D priority patent/FR977857A/fr
Application granted granted Critical
Publication of US2627843A publication Critical patent/US2627843A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02Ink reservoirs
    • B43K5/04Ink reservoirs flexible

Definitions

  • My invention relates generally to ball-point writing instruments .and it has to do particularly with a ball-point writing instrument of the type including a casing in which is mounted a writing unit adapted to be projected and retracted through an opening in the casing. 7
  • One of the objects of my invention is to provide an improved ball-point writing instrument of the foregoing character.
  • Another object is to provide new and improved casing structure for a ball-point writing instrument which casing structure is arranged for special manipulation to control the projecting and retracting of the writing unit.
  • a further object of my invention is to provide an improved casing for ball-point writing instruments and which is provided with telescopic sections adapted upon extension to project the writing point from the casing where it is exposed for writing and upon contraction to retract the writing point into a concealed position within the casing.
  • a further object of my invention is to provide a ball-point writing instrument having a casing formed of axially aligned telescopic sections enabling the casing to be lengthened for writing use and shortened for storage purposes, the casingsections being operably connected to mechanism removably supporting a ball-point writing unit and adapted to translate. lengthing movement of the casing sections with extension movement of the writing unit through the casing into writing position and shortening movement of the casingsections into retractive movement of the writing unit to a non-writing position within the casing.
  • Another object of the invention is to provide a casing of simple construction for a ball-point writing instrument which is operable solely upon extension and contraction of the casing respectively to project the writing point from the casing and hold it in projected condition against normal writing pressure and to retract the writing point into the casing and hold it therein against accidental displacement.
  • Still another object of the invention is to provide a casing of the character described adapted to detachably receive a writing unit or cartridge including a ball writing point, an ink reservoir and a feed connecting the reservoir and the writing point, and from which casing the writing unit can be readily removed and replaced by the user without disassembling or removing the mechanism for projecting and retracting the unit.
  • Still another object of the invention is to provide a new and improved writing unit or cartridge for a ball-point writing instrument which .is simple and inexpensive to manufacture, and
  • a further object of the invention isto provide a casing for a ball-point writing instrument of the type wherein the writing point may be retracted into the casing when not in use, which casing is adapted to be extended and contracted and which, when in extended condition, is of sufiicient length to permit it to be held comfortably in the hand for writing purposes and which, when in contracted condition, is short and compact and can be conveniently carried in a small space, as for example, a ladys purse or a womans vest pocket.
  • Figure l is a side elevational view of a writing instrument constructed in accordance with my invention, the casing being shown in contracted, non-writing condition;
  • Fig. 2 is a view similar to Fig. l, but with the casing shown in extended or writing condition;
  • Fig. 3 is a longitudinal sectional view taken along line 3-3 of Fig. 1;
  • Fig. 4 is a longitudinal sectional view taken along line i-4 of Fig. 2;
  • Fig. 5 is an enlarged, tranverse sectional view taken along line 5-5 of Fig. 3;
  • Fig. 6 is an enlarged, tranverse sectional view taken along line 6-6 of Fig. 3;
  • Fig. 7 is an enlarged, transverse sectional view taken along line il of Fig. 3;
  • Fig. 8 is a side elevational view of the writing instrument with the casing in extended condition and sectioned to show the interior construction
  • Fig. 9 is a view similar to Fig. 8 but with the casing shown in contracted condition.
  • the writing instrument comprises a tubular casing including a forward section and a rearward section 2, which sections are axially aligned and arranged in mutual telescoping relation for extension and contraction in a manner which will be explained more fully hereinafter.
  • the casing When the sections are extended, the casing is lengthened so that it may readily be grasped by the hand of the user for writing, and when the sections are contracted, the casing is shortened into a very compact form so that it may readily be inserted into a small pocket or container, such as a purse.
  • the casing section I includes a barrel portion 3 (Fig. 4) of generally cylindrical, tubular form open at both ends, and a tip member or nose 4, preferably of generally tapered form terminating in a forward open end 5 of reduced diameter.
  • the tip member '4 is detachably connected to the forward end of the barrel portion 3 as by threads 6 and 1 formed, respectively, on the rear end of the tip member 4 and the forward end of the barrel portion 3.
  • the barrel portion 3 is formed with a reduced forward end portion '8 for receiving the tip member 4 and the outer rel portion H! of generally cylindrical, tubular form, open at both ends and telescoped over the forward barrel portion 3 for longitudinal sliding movement thereon without rotational movement relative thereto.
  • a sleeve I Disposed in, and firmly carried by, the rear barrel portion I is a sleeve I formed with a slot
  • the tang I3 rides in the slot I2 and prevents relative rotation of the casing sections.
  • the rear end of the rear barrel portion I0 is closed by an end piece l having an inner rim or flange I6 which is expanded outwardly to engage the adjacent portion of the sleeve H and to clamp the latter against the rear barrel portion l0 thus securing the end piece
  • a cartridge type writing unit is disposed in the forward barrel section and is mounted therein for limited longitudinal displacement whereby its writing tip may be projected out of the forward end of the casing section in which position it is exposed for writing or alternatively retracted to a concealed position within the easing wherein it is housed and protected.
  • the writing unit 20 comprises a body or casing 2
  • is provided with a tapered forward end 23 which receives a tip and feed element having a body 24 of generally tapered form seated snugly in the end 23 of the casing 2
  • the tip body 24 is formed with an extension 29 which projects from the casing 2
  • An ink feed passage 21 extends through the body 24 and connects the interior of the ball socket 25 with the ink reservoir 22 whereby ink may be fed from the reservoir 22 to the ball 26 in a manner which will be well understood. Since the details of construction of the ball seat and the ink feed passage leading thereto form no part of the present invention, such construction is not illustrated in detail herein, it being understood that any suitable type of ball mounting and feed may be employed.
  • Means are provided for preventing escape of ink from the rear end of the reservoir 22 and at the same time excluding air from the reservoir, thus preventing the admixture of air and ink g. in the reservoir and the resultant possibility of air bubbles finding their way into the feed connecting the reservoir and the ball socket and interrupting the feed of ink to the ball.
  • This is accomplished, preferably, by disposing a flexible wall in position to close the end of the reservoir 22, which wall in the present illustrative embodiment takes the form of a flat, elongated sac 30 disposed in the reservoir 22 and adapted to be collapsed against the wall of the reservoir when the latter is filled with ink, as indicated in Figs. 3 to 7 of the drawings.
  • the sac 3B is formed of a suitable material which is impervious to liquid and air and is sufficiently flexible to remain in contact with the surface of the ink and to follow the body of ink as ink is Withdrawn from the reservoir in writing.
  • the sac 30 is formed of material which is resilient and in its normal condition is expanded to substantially fill the space within the reservoir 22.
  • the sac 30 is forced into a flat, collapsed condition as illustrated for example in Figs. 3 to 7 of the drawings.
  • the sac 30 has sufficient resiliency that it tends to return to its normal, expanded condition and thus exerts a continuous, slight pressure on the surrounding ink and. maintains a continuous column of ink from the reservoir to the writing point until the reservoir is substantially emptied.
  • the slight pressure on the ink aids in feeding the ink and prevents the establishment of a subatmospheric pressure behind the ink which would retard or prevent the withdrawal of ink from the reservoir when the instrument is used in writing.
  • a nonresilient or limp sac may be employed in a form generally similar to the sac shown.
  • a sac serves to retain the ink in the reservoir and prevents the entry of air.
  • This type of sac does not apply any pressure to the ink but since the sac is limp it follows the body of ink under the influence of atmospheric pressure as ink is withdrawn from the reservoir and thus the ink is maintained at atmospheric pressure.
  • the sac is secured suitably in position to close the rear end of the body 2
  • secures the sac 353 in the neck 32.
  • the lip or rim of the neck 32 preferably is bent over to form a flange 33 for retaining the plug 31 in place.
  • .behind the sac 3?) is suitably vented as by a passage 34 in the plug 3
  • the rear casing section '2 is vented to atmosphere, as by a vent H 'in the end piece IE to insure "that the interior is maintained at atmospheric pressure. This not only provides atmospheric pressurerbehind the sac in the body 2
  • .-a driving or actuating mechanism which carries the unit 26 and is operatively connected to the casing sections I and 2 for :actuation thereby.
  • The. actuating mechanism includes a driven sleeve 60 f (Figs. 4 and 5-) mounted-in the forwardbarrel portion 3- for'both longitudinal sliding andpartial rotational :movement with respect thereto.
  • the sleeve in removably and frictionally receives the writing unit 29.
  • Rearward "displacement of the .unit in the sleeve is limited by an intu'rned lip or. rim 4
  • the writing unit 29 is readily removabl from the sleeve 40 for replacement by asimilar-unit ject or retract the writing unit 20, respectively.
  • the rearward sleeve 11 is formed with a projection 01' 'tan'g' 50 which rides in a helical cam track 5'! formed in thedriven sleeve 60.
  • the tang 556 also serves as a stop to limit extensionof the casing sections and to prevent separation there advance and carries with it the writing "unit 20.
  • the driven sleeve lil iscaused to-rotate in 'afclock wise direction (as viewed from the -forward end "of the writing instrument) and is moved rearcasing sections may be determined by suitably selecting the length of the guide track If or either of the cam tracks :5! 01"5'6.
  • the'members are so dimensioned that the forward end of the rear casing section is brought into abutment with the ring 54"at the end of its forward travel.
  • the pitch or rise 'of .the cam track 56 relatively to the cam track 5! is so selected that the pin 52 is moved (relatively) longitudinally only "a relatively short distance when the tang 'iflfinoves through the entire extent of its travel.
  • the writing unit is projected or retracted throughout a relativelyshort'distancel This short movement of the unit is adequate to retract the point from its projectedwriting position to a concealed position :sumiently within the casing to prevent the point from contacting the hands or clothes of theuser.
  • 'the'writing unit may be as long as or slightly longer than the forward casing sectiomwithout substantially limiting the extent of collapsing movement of the casing sections.
  • This cam track may take the form of a slot r groove which 'tur ns"onspir'als in the same direction as the track '5] and a substantially flat p'itchbor low rateoi rise rliitively to the track 5 I.
  • the present invention provides an extensible and contractible casing which is positive in its operation to control the projecting and retracting movements of a ball-point writing instrument.
  • casing section may be contracted or extended by simple push-pull movement and without the necessity for operating any release buttons,
  • the construction insures that the casing sections will remain in either position of adjustment against axial displacement as, for example, when the instrument is inserted in or removed from the pocket or purse of the user.
  • the writing unit or cartridge may be readily removed or replaced by the user With out removing or disassembling the actuating mechanism.
  • the casing may be made of such length that when extended it fits comfortably in the hand for writing purposes and when contracted is short and compact and can be conveniently carried in a small space as, for example, a lady's purse or a womans vest pocket.
  • the writing unit is snugly fitted in the driven sleeve and is substantially housed thereby.
  • the driven sleeve thus serves to protect and reinforce the body portion of the unit and the latter is subjected to no stress during use or operation except the pressure applied to the tip when the instrument is used in writing.
  • the body may be formed of relatively thin material providing a reservoir of maximum ink capacity for any particular diameter of unit.
  • the construction of the actuating mechanism is such that it consumes a relatively small amount of space and thus the unit may be of a size closely approaching the size of the casing.
  • a relatively large capacity ink reservoir may be provided in an instrument of a size comparable to a conventional fountain pen.
  • the instrument may be made of relatively light construtcion and yet be sufficiently sturdy to provide for a long life.
  • the parts are relatively simple and can be manufactured inexpensively.
  • the barrel members and the cartridge body may be formed advantageously from seamless tubing, and others as, for example, the sleeves may be formed from flat sheet material.
  • the several members, except the sac preferably are formed from metal such as stainless steel which is resistant to rust and corrosion and is sufliciently rigid for the purposes required. Since the writing unit may be made inexpensively, it may be discarded entirely when empty and a new unit substituted therefor.
  • the casing may be formed in any one of a number of various sizes and shapes and may be ornamented, as desired. Due to the fact that a portion of the forward casing section is exposed when the casing is extended and is concealed when the casing is contracted an attractive appearance may be created by ornamenting that portion as, for example, by longitudinally extending lines or flutes 60 (as indicated in Fig. 2) and by having the remainder of the casing unornamented.
  • a ball-point writing instrument comprising a forward tubular casing section including a barrel portion having an open end and a tapered tip member detachably secured to and substantially closing the open end of said barrel portion and having an open forward end of substantially smallerdiameter than the open end of said barrel portion, a rearward casing section including telescoped inner and outertubular members secured together at their rear ends only, said forward casing section being telesconed and slidable between said inner and outer tubular members, means guiding said casing sections for relative longitudinal movement only, a driven element mounted for rotation and longitudinal movement in said forward casing section and having two helical cam tracks spiraling in the same direction, studs on said forward casing section and inner tubular member engaging said cam tracks respectively, a ball-point writing unit detachably carried by said driven element and insertable and removable through the open forward end of said barrel portion when said tip member is removed, said unit having a ball writing point positioned to be projected and retracted through, the open end of said tip member upon longitudinal movement of said driven element
  • a ball-point writing instrument comprising a forward casing section including a barrel portion having open forward and rearward ends and an inwardly extending projection adjacent its rearward end, a rearward casing section including a barrel portion slidable over said forward barrel portion and concealing said projection, a driving sleeve in said rear barrel portion and slidable in said forward casing section, and means connecting aid rear barrel portion and said driving sleeve at their rear ends, said driving sleeve having a rectilinear guide track extending longitudinally thereof and slidably receiving therein the projection on said forward casing section for guiding said barrel sections for longitudinal movement only, a driven sleeve having two helical cam tracks therein spiraling in the same direction, said driven sleeve being mounted for rotation and longitudinal movement in said forward casing section, a writing unit carried in said driven sleeve and having a ball writing point positioned to be projected and retracted through the open end of said forward casing section upon longitudinal movement of said driven sle
  • a ball-point writing instrument comprising a rear casing section including telescoped inner and outer tubular members secured together at their rear ends only, a forward tubular casing section telescoped and slidable between said inner and outer tubular members, guide means guiding said forward and rearward casing sections for longitudinal relative sliding movement only, a driven sleeve telescoped in said forward section and said inner tubular member and completely concealed by the forward section and formed with helical cam tracks therein spiraling in the same direction, one of said cam tracks having a relatively fiat pitch and being located forwardly of the forwardmost position of said inner tubular member and the other cam track having a relatively steep pitch and being located rearwardly of said first-named cam track, studs on said forward casing section and inner tubular member engaging said cam tracks respectively, and a ball-point writing unit insertable through the forward end of and removably carried by said driven sleeve with its point positionedto be projected through the forward end of said forward casing section upon relative sliding movement of said casing sections.
  • a ball-point writing instrument comprising a forward casing section including a barrel portion open at both ends and havine an imnerforate 2 peripheral surface and a tapered tip member detachably secured to and substantially closing the open forward end of the barrel portion, the tip member having an open forward end, a driven element mounted for rotation and longitudinal movement in said forward casing section, a ballpoint writing unit detachably carried by said driven element and insertable and removable through the open forward end of said barrel portion when said tip member is removed, said unit having a ball writing point positioned to bepondered and retracted through the open end of said tip member upon longitudinal movement of said driven element, said driven element having a first, forward helical slot of fiat pitch adjacent its forward end and a second, rearward helical slot of steep pitch extending substantially the full length thereof, a stud fitted in an opening in said barrel portion and extending into said first slot, means on said barrel portion for securing said stud in the opening and concealing the same and removable therefrom upon removal of said tip member, a rear casing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US725609A 1947-01-31 1947-01-31 Writing instrument Expired - Lifetime US2627843A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL68827D NL68827C (xx) 1947-01-31
BE480018D BE480018A (xx) 1947-01-31
US725609A US2627843A (en) 1947-01-31 1947-01-31 Writing instrument
GB2697/48A GB648605A (en) 1947-01-31 1948-01-29 Improvements in ball point writing instruments
CH265864D CH265864A (de) 1947-01-31 1948-01-31 Kugelschreiber.
FR977857D FR977857A (fr) 1947-01-31 1948-01-31 Instrument pour écrire avec élément d'écriture rentrant à bille

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US725609A US2627843A (en) 1947-01-31 1947-01-31 Writing instrument

Publications (1)

Publication Number Publication Date
US2627843A true US2627843A (en) 1953-02-10

Family

ID=24915261

Family Applications (1)

Application Number Title Priority Date Filing Date
US725609A Expired - Lifetime US2627843A (en) 1947-01-31 1947-01-31 Writing instrument

Country Status (6)

Country Link
US (1) US2627843A (xx)
BE (1) BE480018A (xx)
CH (1) CH265864A (xx)
FR (1) FR977857A (xx)
GB (1) GB648605A (xx)
NL (1) NL68827C (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678356A (en) * 1985-07-03 1987-07-07 Garland Thomas N Extendable writing instrument
WO2002045974A1 (de) 2000-12-08 2002-06-13 C. Josef Lamy Gmbh Schreibgerat
GB2467775A (en) * 2009-02-13 2010-08-18 Richard Colin Thomas Allan Writing instrument

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601599A (en) * 1983-12-27 1986-07-22 Katoh Kinzoku Kogyo Kabushiki Kaisha Ball-point pen

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE83807C (xx) *
DE84050C (xx) *
US160924A (en) * 1875-03-16 Improvement in pen and pencil cases
US1583718A (en) * 1923-02-05 1926-05-04 Hudson George Reginald Propeller pencil
US2400679A (en) * 1944-05-17 1946-05-21 Eterpen Sa Financiera Fountain pen
US2427068A (en) * 1945-09-17 1947-09-09 Parker Pen Co Ball-point writing instrument
US2444004A (en) * 1945-01-25 1948-06-22 Eagle Pencil Co Writing implement
US2444003A (en) * 1945-01-19 1948-06-22 Eagle Pencil Co Writing implement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE83807C (xx) *
DE84050C (xx) *
US160924A (en) * 1875-03-16 Improvement in pen and pencil cases
US1583718A (en) * 1923-02-05 1926-05-04 Hudson George Reginald Propeller pencil
US2400679A (en) * 1944-05-17 1946-05-21 Eterpen Sa Financiera Fountain pen
US2444003A (en) * 1945-01-19 1948-06-22 Eagle Pencil Co Writing implement
US2444004A (en) * 1945-01-25 1948-06-22 Eagle Pencil Co Writing implement
US2427068A (en) * 1945-09-17 1947-09-09 Parker Pen Co Ball-point writing instrument

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678356A (en) * 1985-07-03 1987-07-07 Garland Thomas N Extendable writing instrument
WO2002045974A1 (de) 2000-12-08 2002-06-13 C. Josef Lamy Gmbh Schreibgerat
DE10061316C2 (de) * 2000-12-08 2003-07-31 Lamy Gmbh C Josef Schreibgerät
US20040042839A1 (en) * 2000-12-08 2004-03-04 C. Josef Lamy Gmbh Writing implement which lengthens and shortens when actuated
US6832868B2 (en) 2000-12-08 2004-12-21 C. Josef Lamy Gmbh Writing implement which lengthens and shortens when actuated
GB2467775A (en) * 2009-02-13 2010-08-18 Richard Colin Thomas Allan Writing instrument

Also Published As

Publication number Publication date
NL68827C (xx)
FR977857A (fr) 1951-04-06
GB648605A (en) 1951-01-10
BE480018A (xx)
CH265864A (de) 1949-12-31

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