US3495920A - Ball pen refill - Google Patents
Ball pen refill Download PDFInfo
- Publication number
- US3495920A US3495920A US697699A US3495920DA US3495920A US 3495920 A US3495920 A US 3495920A US 697699 A US697699 A US 697699A US 3495920D A US3495920D A US 3495920DA US 3495920 A US3495920 A US 3495920A
- Authority
- US
- United States
- Prior art keywords
- ink
- follower
- piston
- cartridge
- ball
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
Definitions
- a ball pen ink cartridge includes a manually operable axially movable piston for applying pressure to force a compliant follower at the end of the ink column mto the constricted feed tube to enable write-out of substantlally all of the ink in the cartridge.
- the present invention generally relates to ball pen writing instruments of the type which utilize a compllant follower at the rear end of the ink column, and it relates more particularly to new and improved means for enabling write-out of substantially all of the 1nk 111 the cartridge.
- Compliant followers are usually composed of a greaselike substance which is immiscible with the ink and considerably more viscous, whereby such followers prevent the ink from leaking out of the rear end of the reservoir and they also seal the rear surface of the ink column from the atmosphere.
- the principal advantage of this type follower is that it permits the use of a relatively large diameter, high capacity reservoir.
- Such reservoirs ordinarily are connected to the point assembly by a relatively narrow, elongated feed tube through which the follower will not normally move under only the force of gravity and the pulling force, or negative pressure, applied to the follower by reason of the pull of the ball on the ink and the cohesive nature of the ink, upon application of the ink onto a writing surface from the rotating ball.
- a principal object of this invention is, therefore, to provide a new and improved reservoir for a ball pen.
- Another object of this invention is to provide a ball pen reservoir having a reserve ink supply.
- a further object of the present invention is to provide a ball pen cartridge of the compliant follower type including means for exerting an auxiliary pressure on the follower to force it onto the feed tube after the follower has reached the mouth of such tube.
- a rear vented ink supply chamber connected to a ball point assembly by a narrow feed tube through which a viscous or compliant ink follower will not normally pass under only the force of gravity and ball pull on the ink upon a writing-out ice of ink onto a writing surface, and a manually operable means in the rear end of the chamber to increase the pressure on the follower and associated ink column when the follower reaches the mouth of the feed tube.
- FIGURE 1 is a partially sectioned, fragmentary view of a ball pen cartridge embodying the present invention
- FIGURE 2 is a cross-sectional view of the device of FIG. 1 taken along the line 2-2 thereof;
- FIGURE 3 is a cross-sectional view of the device of FIG. 1 taken along the line 3-3 thereof;
- FIGURE 4 is a cross-sectional View of the device of FIG. 4 taken along the line 44 thereof.
- a ball pen cartridge 10 comprising a tubular shell 12 having a necked-down forward portion 14 which is connected to a ball pen assembly 16 by a relatively narrow elongated feed tube 18.
- the point assembly 16 may be conventional and includes a writing ball 20 rotatably mounted in a suitable socket which is supplied with ink through a longitudinal bore which opens at the rearward end of the assembly 16 into the feed tube 18.
- the ink supply 22 of the cartridge is thus contained in the point assembly, the feed tube 18, the neckeddown portion 14 and the main shell 12, and a compliant follower 24 which consists of a small quantity of grease or the like is provided at the rear end of the ink column.
- the follower 24 is immiscible with the ink 22 and is considerably more viscous than the ink. It is suffieiently fluid, however, to readily conform to the inner surface of the shell 12 as the ink is written out, and the follower is held by gravity and ball pull or atmospheric pressure against the rear surface of the ink column. However, the viscosity of the follower 24 is too great for it to follow the ink column into the necked-down area 14 and through the feed tube 18 by only the forces of gravity and the negative pressure or ball pull produced by the pumping action of the ball.
- Means are provided to exert an auxiliary force on the follower 24 when it has moved as far forward as it can under these normally acting forces alone.
- these means comprise a piston 26 mounted in the rear end ,of the shell 12 for axial movement into a constricted portion 28 having a cylindrical inner surface 30 which is slightly smaller in diameter than the external diameter of the piston 26.
- the shell is preferably formed of metal although plastic may also be used. Accordingly, when the piston 26 is moved into the constricted portion 28 the air located in the shell 12 between the follower 24 and the forward face of the piston 26 is compressed and exerts a forwardly directed force on the follower 24 and the ink column located forwardly thereof.
- This auxiliary pressure is sufficient to enable the follower 24 to thereafter move through the necked-down portion 14 and the feed tube 18 as the ink ahead of the follower is written out. This pressure is not so great, however, as to force the ball 20 out of its socket .or to squeeze the ink past it and out of the pen.
- the piston 26 has a threaded shank 32 which mates with internal threads in the bore 46 of a ratchet 34 rotatably mounted in the rear end of the shell 12.
- the ratchet 34 has an annular groove 36 into which the shell is deformed at 38 to rotatably secure the ratchet 34 in place.
- the rearward portion of the ratchet 34 inincludes camming and locking surfaces which are used in connection with the propel-repel mechanism of the pen holder with which the cartridge 10 is adapted to be used, but in the cartridge it also provides a convenient knob which the user may rotate with his fingers to move the piston 26 forwardly into its pressure applying position.
- theparticula r shank of the ratchet 34 maybe modified to cooperate with other types of propel-repel mechanisms.
- the shank 32 of the piston is held against rotation my means of a collar 40 which is staked in place just forwardly of the ratchet 34.
- the collar 40 has a generally rectangular bore with flat sides 42 which are adapted to engage fiat sides 44 of the shank 32 to prevent rotation thereof.
- the collar 40 also has a radial slot 48 in its forward face to provide an air venting channel, as hereinafter explained.
- the shank 32 loosely extends through the collar 40 thereby.;to enable axial movement of the piston 26 relative to the collar 40 and also to pwvide an inner air passage thrpugh the; collar.
- the fiat sides 44 of the piston shank 32 define air passageways through the centrally disposed annular bore 46 extending through the ratchet 34.
- the threads on the piston shank be in a direction such that any tendency of the ratchet 34 to be rotated by the threading of the cap onto the barrel 12 will move the piston rearwardly of the cartridge.
- the threads are preferably selected to cause withdrawal of the piston when the ratchet is rotated clockwise.
- a ball pen" ink cartridge including a point assembly, a rear-vented ink-containing reservoir, a compliant ink follower slidabie in said reservoir, and a constricted feed tube connecting said reservoir to the point assembly and being of a diameter through which said followeriwill not normally pass under only the force of gravity and the writing pull of the ball on the ink and follower, the improvement comprising a manually operable piston: mounted in said reservoir rearwardly of said follower and axially movable from a position where it does not close 011?
Landscapes
- Pens And Brushes (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US69769968A | 1968-01-15 | 1968-01-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3495920A true US3495920A (en) | 1970-02-17 |
Family
ID=24802179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US697699A Expired - Lifetime US3495920A (en) | 1968-01-15 | 1968-01-15 | Ball pen refill |
Country Status (4)
Country | Link |
---|---|
US (1) | US3495920A (en) |
BR (1) | BR6905557D0 (en) |
FR (1) | FR2000232A1 (en) |
GB (1) | GB1194997A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4889442A (en) * | 1988-03-23 | 1989-12-26 | Mitsubishi Pencil Co., Ltd. | Writing instrument with ink quantity of level detecting function |
US20030102334A1 (en) * | 2000-04-25 | 2003-06-05 | Hideyuki Usami | Coating device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4881088A (en) * | 1988-08-26 | 1989-11-14 | Fisher Jr Paul C | Plotter pen ink level detector |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1005717A (en) * | 1947-09-10 | 1952-04-15 | Reservoir pen holder | |
US3075497A (en) * | 1962-01-18 | 1963-01-29 | Russell S Tate | Pressurized fountain pen |
US3113558A (en) * | 1960-12-29 | 1963-12-10 | Leonard L Marraffino | Marking device |
US3139864A (en) * | 1959-02-12 | 1964-07-07 | Henriksen Ernst Johan Jens | Fountain pen structures |
US3282255A (en) * | 1963-11-18 | 1966-11-01 | Donald P Killen | Pressurized ball point pen |
US3334616A (en) * | 1965-10-20 | 1967-08-08 | Paper Mate Mfg Co | Ink utilization in writing instruments |
-
1968
- 1968-01-15 US US697699A patent/US3495920A/en not_active Expired - Lifetime
-
1969
- 1969-01-14 FR FR6900411A patent/FR2000232A1/fr not_active Withdrawn
- 1969-01-14 GB GB2241/69A patent/GB1194997A/en not_active Expired
- 1969-01-14 BR BR205557/69A patent/BR6905557D0/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1005717A (en) * | 1947-09-10 | 1952-04-15 | Reservoir pen holder | |
US3139864A (en) * | 1959-02-12 | 1964-07-07 | Henriksen Ernst Johan Jens | Fountain pen structures |
US3113558A (en) * | 1960-12-29 | 1963-12-10 | Leonard L Marraffino | Marking device |
US3075497A (en) * | 1962-01-18 | 1963-01-29 | Russell S Tate | Pressurized fountain pen |
US3282255A (en) * | 1963-11-18 | 1966-11-01 | Donald P Killen | Pressurized ball point pen |
US3334616A (en) * | 1965-10-20 | 1967-08-08 | Paper Mate Mfg Co | Ink utilization in writing instruments |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4889442A (en) * | 1988-03-23 | 1989-12-26 | Mitsubishi Pencil Co., Ltd. | Writing instrument with ink quantity of level detecting function |
US20030102334A1 (en) * | 2000-04-25 | 2003-06-05 | Hideyuki Usami | Coating device |
US6729787B2 (en) * | 2000-04-25 | 2004-05-04 | Pentel Kabushiki Kaisha | Applicator using pressurized air to aid in dispensing liquid |
Also Published As
Publication number | Publication date |
---|---|
FR2000232A1 (en) | 1969-09-05 |
GB1194997A (en) | 1970-06-17 |
BR6905557D0 (en) | 1973-01-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PARKER PEN (BENELUX) N.V., TAKKEBIJSTERS 1, (4811 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PARKER PEN COMPANY THE A CORP. OF DE.;REEL/FRAME:004562/0893 Effective date: 19860131 Owner name: BANKERS TRUST COMPANY Free format text: SECURITY INTEREST;ASSIGNOR:PARKER PEN (BENELUX) N.V.;REEL/FRAME:004547/0644 Effective date: 19860131 |
|
AS | Assignment |
Owner name: PARKER PEN (BENELUX) N.V.,NETHERLANDS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANKERS TRUST COMPANY;REEL/FRAME:004823/0983 Effective date: 19871029 Owner name: PARKER PEN (BENELUX) N.V., TAKKEBIJSTERS 1, (4811 Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANKERS TRUST COMPANY;REEL/FRAME:004823/0983 Effective date: 19871029 |
|
AS | Assignment |
Owner name: PARKER PEN (BENELUX) B.V. Free format text: RE-RECORD OF INSTRUMENT RECORDED MARCH 5, 1986, AT REEL 4562 FRAMES 0893-898 TO CORRECT NAME OF ASSIGNEE IN A PREVIOUSLY RECORDED ASSIGNEE.;ASSIGNOR:PARKER PEN COMPANY, THE, A DE CORP.;REEL/FRAME:004880/0123 Effective date: 19880316 Owner name: BANKERS TRUST COMPANY Free format text: RE-RECORD OF INSTRUMENT RECORDED MARCH 5, 1986 AT REEL 4547 FRAMES -0644-0648 TO CORRECT NAME OF ASSIGNOR IN A PREVIOUSLY RECORDED ASSIGNMENT.;ASSIGNOR:PARKER PEN (BENELUX) B.V.;REEL/FRAME:004880/0131 Effective date: 19880316 |
|
AS | Assignment |
Owner name: PARKER PEN (BENELUX) B.V. Free format text: RE-RECORD OF AN INSTRUMENT RECORDED JAN. 14, 1988, AT REEL 4823, FRAME 983-987 TO CORRECT THE NAME OF THE ASSIGNEE;ASSIGNOR:BANKERS TRUST COMPANY, A DE. CORP.;REEL/FRAME:005093/0539 Effective date: 19871029 |