Specific Ball-retainer Patents (Class 401/216)
  • Patent number: 5150979
    Abstract: A barrel, and a hollow cup-shape insert in the front end thereof, forming a capillary space between itself and the barrel. The insert has a closed front end, the tip portions of the insert and the barrel form a ball seat in which the writing ball is positioned, and the capillary space leads to the ball. The rear end of the insert is open and communicates with the main space in the rear portion of the barrel. A flexible bag is positioned in the rear of the barrel, for filling through a filler tube which constantly vents the interior. The main space in the rear portion of the barrel and that in the insert together form a single continuous space, substantially without internal obstruction. The ink is in the form of a main body of fluid, freely flowing, aqueous ink. When the pen is laid on its side, the body of ink communicates with the capillary space, filling it by capillarity action, and that ink feeds by capillary action to the ball.
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: September 29, 1992
    Inventor: Paul H. Gallagher
  • Patent number: 5104249
    Abstract: A writing tip for ball point pens include a receiving bore for a writing ball worked into the tip housing, a circumferential support surface inclined towards a central feed bore and arranged between same and with receiving bore, feed channels discharging into the central feed bore and into the support surface and spherically-shaped support zones adapted to the ball. Capillarity increasing intermediate surfaces respectively between the spherically-shaped support zones and the feed channels.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: April 14, 1992
    Assignee: J.S. Staedtler GmbH & Co.
    Inventors: Horst Elsner, Horst Hulsenbeck
  • Patent number: 5051017
    Abstract: A roll-on applicator of rigid plastic material having a glass or crystal clarity is fabricated of a blow molded bottle element and an injection molded sealing ring for retaining a spherical ball in the neck of the bottle element, the ring forming the uppermost surface of the applicator and ball assembly. The product is placed in the applicator, the ball is assembled into the bottle and the ring is attached to the bottle by an ultrasonic welding process.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: September 24, 1991
    Assignee: The Gillette Company
    Inventor: Charles H. Yorks
  • Patent number: 5000605
    Abstract: A ball point pen wherein the ball is held in the front end of a tubular metallic holder. The inner side of the holder is coated with a molded plastic lining which defines a centrally located ink supply channel extending all the way to the ball, one or more axially parallel groove-like capillary channels which communicate with the channel and also extend all the way to the ball, and a seat which is engaged by the confined portion of the peripheral surface of the ball when the pen is in used. The external surface of the holder is partially coated with a jacket which is a snug fit in the front end portion of the housing of the ball point pen and is integrally connected with the lining at one or more points. The lining and the holder, as well as the holder and the jacket, have complementary annular profiles to fix the holder in a desired axial position as soon as the material of the jacket and lining sets.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: March 19, 1991
    Assignee: Gebr. Schneider GmbH
    Inventor: Roland Schneider
  • Patent number: 4993860
    Abstract: An applying device is described comprising a container 10 for liquid applying medium the filling opening 40 thereof is provided with an applying element 34. A ball 40 is located in the outlet opening 38 partially extending beyond the outlet opening. The outlet opening is connected to the internal space 20 of the reservoir 10 through a central hollow space 36. A spring element 48 located in the central hollow space 36 of the applying element 34 urges the ball 40 against the outlet opening for a closure thereof. The spring element 48 includes a rod-like portion 50 which is adapted to be laterally resiliently arched if a pressure is exerted on the ball. The rod-like portion 50 of the spring element 48 engages the ball 40 by an end portion. The opposite second end portion of the spring element 48 is secured in the central hollow space 36 of the applying element 34.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: February 19, 1991
    Inventor: Lothar Sommer
  • Patent number: 4952089
    Abstract: A writing implement for use in numerically controlled drafting machines has a tip with a front end face which is maintained at a distance of a fraction of one millimeter from the surface of a sheet of paper or another carrier of information by a portion of a ball which is rotatably mounted in a socket extending rearwardly from the front end face so that the surface of the carrier and the front end face define a capillary gap. This gap draws ink from the socket which receives ink from a channel extending into a reservoir in the housing of the implement. The channel contains several rib-shaped back supports each of which is in mere point contact with the adjacent confined major portion of the ball in the socket so as to center the ball in the socket whereby the confined major portion of the ball and the surface surrounding the socket define a capillary clearance, and to provide paths for the flow of ink from the channel into the socket.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: August 28, 1990
    Assignee: Gebr. Schneider GmbH
    Inventor: Roland Schneider
  • Patent number: 4940350
    Abstract: A fluid applicator includes a fluid container having a collar mounted at an open top end. A base is mounted in the collar and is shaped to conform to the shape of a porous, spherical applicator member rotatably mounted in the collar, with a portion of the applicator member extending outward from the collar. An air intake conduit is centrally mounted in the base and draws air from the pores in the applicator member into the interior of the container to control the rate of fluid dispersion through fluid outlets formed in the base to the applicator member.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: July 10, 1990
    Inventor: Yong I. Kim
  • Patent number: 4842433
    Abstract: A pen tip structure for a ball point includes a ball socketed between a pipe tip and the end of an inner core, the end of the inner core having a flat center surface for supporting the ball and an annular lip which flares outwardly from the flat center surface to create a capillary gap between the ball and the pipe tip. Ink is supplied to the ball from a capillary ink flow channel between the inner core and the pipe.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: June 27, 1989
    Assignee: Teibow Co., Ltd.
    Inventor: Katsumi Otsuka
  • Patent number: 4795286
    Abstract: A pen tip structure comprises (1) an elongated stem which defines a cylindrical outer surface and a flat end surface, the flat end surface including one or more grooves which extend from the cylindrical outer surface radially inwardly towards a center point thereof, (2) a tube positioned around the elongated stem, the tube including inwardly-extending protrusions that form at least one longitudinal ink flow channel along the cylindrical outer surface of the elongated stem, and an end portion which is located beyond the flat end surface of the elongated stem, the end portion providing a mouth, and (3) a rotatable member positioned between the noted mouth and the flat end surface of the elongated stem, the rotatable member having a surface portion which extends beyond the mouth for conveying ink to a receiving surface and an opposite surface portion for receiving ink supplied thereto by capillary action.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: January 3, 1989
    Assignee: Teibow Co., Ltd.
    Inventors: Tetsuo Shimoishi, Yasuhiro Aoki, Katsumi Otsuka
  • Patent number: 4722124
    Abstract: A method of manufacturing the writing tip of a ball point pen which has the steps of inwardly pressing the end of a fine metallic tube at the entire periphery to form a drawn portion, drawing the inner wall of the drawn portion to form a ball holding portion, forming a slot for leading ink at the ball seat portion, inserting the ball into the ball holding portion, and allowing the ball to be held at the ball holding portion. Thus, the durability of the tube can be improved, and the design of the supply passage of ink can be freely performed without restriction in the diameter of the ball.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: February 2, 1988
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Toshiaki Serikawa, Hiroshi Takagi
  • Patent number: 4717277
    Abstract: A method for the production of a writing point for liquid ink by utilizing a tube (5) of small internal diameter and a writing point which is produced thereby are proposed. In such a case, axially extending ink channels (3) are provided in the internal wall of the fixed tube (5) having an internal diameter which substantially corresponds to the diameter of a ball (1), said channels (3) extending to the free end of the tube (5) and being spaced from one another. A circumferential, annular recess (9) is formed in the tube (5) at a distance from the free end of said tube, and the ball (1) is inserted into the free end until it abuts against the recess (9). Subsequently, the free edge of the tube (5) is inwardly flanged, and a substantially cylindrical ink conductor (4) is inserted into the remote end of the tube and partially overlapped by the ink channels (3).
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: January 5, 1988
    Inventor: Rudi Hutt
  • Patent number: 4603994
    Abstract: A ball-holder of a ball-point pen comprises a writing ball rotatably held at one end of a metal tube, and a synthetic resin rod inserted into the tube with one end of the rod defining a ball seat in rotatable contact with the ball. The rod is secured to the tube proximate the ball seat by press deforming the tube from two opposite directions to form two inward projections of the tube which project inwardly into engagement with the rod to fixedly secure the rod to the tube. During the press deforming of the tube to form the two projections, the two portions of the tube situated between the two projections are expanded outwardly to form a pair of expansions of the metal tube which are effective to prevent disruption of the ink flow which would otherwise occur due to the two projections.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: August 5, 1986
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Yoshinobu Mitsuda, Tai Inami, Koji Mori
  • Patent number: 4529329
    Abstract: A writing instrument with a ballpoint pen comprising a metallic fine rod having a plurality of capillary holes for flowing ink from one end thereof through the other end in the interior thereof, a short cylindrical portion extending from one end thereof, and an annular narrowed portion on the peripheral edge of the front end of the short cylindrical portion;a hard ball rotatably fitted to and held inside the annular narrowed portion and the short cylindrical portion and being in contact with one end of the metallic fine rod inside the short cylindrical portion;and means for introducing aqueous ink connected to the other end of the metallic fine rod.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: July 16, 1985
    Assignee: Shachihata Industry Co., Ltd.
    Inventors: Masao Hirabayashi, Takeshi Mizutani
  • Patent number: 4500222
    Abstract: A writing tip 1 for use with aqueous ink comprises an elongate housing 2. A writing ball 3 is retained in a socket 4 at one end 5 of the housing and a fibrous feed core 6 having aqueous ink feeding capillaries extends into a bore 7 in the housing from the other end 8. The core 6 acts to transfer aqueous ink from a source to the ball via a grooved feed passage 9 between the bore 7 and socket 4 and in order to provide releasable transfer of ink between the core 6 and the passage 9, the core is inserted into the end 13 of the passage, the material of the core being substantially uncompressed within the grooves 12 of the passage 9 and assuming substantially the cross-section of the passage at least at the end 13.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: February 19, 1985
    Assignee: Waite & Son Limited
    Inventor: John P. Clading-Boel
  • Patent number: 4457644
    Abstract: A ball-point pen tip provided with a tubular ink guide portion formed of metal. The ink guide portion is formed with radial projections extending radially inwardly produced by the pressing deformation of the metal tube. These projections define capillary channels between neighbouring projections and a ball seat at their radially oriented surfaces. An ink guide stem disposed in the tubular ink guide portion has one end in contact with at least one of the projections, and has the other end confronting with an ink supply stem inserted in a holder. The holder and the ink guide portion provide a socket of the pen tip. Such pen tip is applied to a ball-point pen which includes an ink reservoir adapted to be connected to said ink supply stem. Such ball-point pen employs an aqueous solution based low viscosity ink.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: July 3, 1984
    Assignee: Pilot Ink Co., Ltd.
    Inventor: Takehiko Yokosuka
  • Patent number: 4430014
    Abstract: A ball point pen writing instrument capable of being simply filled in aqueous ink solution and fitted with a ball point pen to be used as an ordinary writing instrument. When the ink is exhausted it can be refilled for use in the same manner as an ordinary fountain pen.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: February 7, 1984
    Assignee: Cathay Pen Corporation
    Inventor: Kuo L. Tsai
  • Patent number: 4406555
    Abstract: A writing instrument with a nib that is easily removed and replaced with a spare unit stored inside the pen holder. A capillary and ink core guide is provided to supply ink from storage to a ball or other writing means.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: September 27, 1983
    Assignee: Cathay Pen Corporation
    Inventor: Kuo L. Tsai
  • Patent number: 4384800
    Abstract: A tip for a ball point pen utilizing a water soluble ink is provided, and comprises a ball holder which rotatably supports a ball in a tip end thereof, a ball abutment defined within the ball holder, and an ink passageway providing a communication between the ball abutment and an ink supply path. The ink passage is elongate in cross section. The ball abutment is defined by four flat bearing surfaces which are inclined toward the center of the passageway, two of the bearing surfaces being disposed on each side of the passageway and being directly joined with each other with an angle therebetween, the ball being supported by contact with a point on each of the four bearing surfaces, the joining portions between the bearing surfaces defining an ink reservoir which communicates with the passageway.
    Type: Grant
    Filed: July 15, 1980
    Date of Patent: May 24, 1983
    Assignee: Pentel Kabushiki Kaisha
    Inventor: Hirosi Dyama
  • Patent number: 4359292
    Abstract: A cosmetic dispenser is disclosed which include a socket having a dispensing opening and three orthogonal axes, one axis extending through the socket and the other two lying substantially in the plane thereof. An applicator member is retained in the socket and has an upper portion extending exteriorly of the dispensing opening and a skirt portion substantially retained within the socket. The applicator is adapted for rotation about the three axes, but stop means limit rotation of the applicator member about the two axes in the plane of the socket. In this manner when rotation occurs about the axes of limited rotation, the dispenser is operable to feed cosmetic across the skirt portion to the upper portion of the applicator member for application to a surface to be treated with the cosmetic.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: November 16, 1982
    Assignee: The Gillette Company
    Inventors: Harold R. Thompson, Ernest H. Duval
  • Patent number: 4355915
    Abstract: A ball-point pen comprises a tip having a ball retainer at its front end for rotatably carrying a ball therein and having a through-opening formed in the ball retainer for communication with the rear end thereof, and an axial sleeve for containing a quantity of ink therein. The through-opening is formed a plurality of axially and radially extending ink guide grooves in its inner surfaces. The guide grooves have a width which is gradually narrowed toward the axis of the pen and a radial depth which is gradually reduced toward the ball retainer.
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: October 26, 1982
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Shigeru Kaji, Seiji Noguchi
  • Patent number: 4342522
    Abstract: A roll-on dispenser having an applicator ball, which dispenser is provided with a porous membrane that coacts with the ball to regulate the dispension of controlled amounts of powders. The amounts of material dispensed is dependent upon the porosity of the membrane and the porosity of the membrane is dependent upon the degree of its deformation by the ball upon operation of the dispenser.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: August 3, 1982
    Assignee: Bristol-Myers Company
    Inventor: Leonard Mackles
  • Patent number: 4281779
    Abstract: A valve mechanism for dispensing viscous, sticky materials from a container having a neck defining a discharge opening. The valve is formed by a tubular body threaded at one end for engaging the container neck. A normally closed spring biased valve in said body controls the discharge of material from said container. The valve body defines a spheroidal dispensing cavity opening through one end thereof for accessibly retaining for subsequent use an increment of material discharge from the container through the valve. In an alternative version, a ball valve is so seated as to preclude wedging of the material into the valve seat.
    Type: Grant
    Filed: January 18, 1979
    Date of Patent: August 4, 1981
    Inventor: John S. Shepard
  • Patent number: 4251164
    Abstract: In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body, a ball supporting seat of a plastic held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its opening at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seat, there is provided an improvement constituted by a recess formed in the bottom surface of the ball receiving hole, the recess having at least one angular portion, the ball supporting seat being deformed to fill all the corners of the bottom of the hole including the recess, thereby preventing the ball supporting seat from rotating in the bottom surface of the ball receiving hole.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: February 17, 1981
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Eishiro Nakagawa, Taketoshi Miyamoto, Naozi Umino, Hirosi Oyama
  • Patent number: 4231146
    Abstract: In a tip for a ball point pen including a cylindrical metallic tip body having a pointed end, a ball receiving hole having its opening at the pointed end of the tip body, a ball supporting seat of a plastic held in the bottom of the ball receiving hole, a bore for delivering ink to the ball receiving hole through the ball supporting seat and having its opening at the end of the tip body opposite to the pointed end, and a ball rotatably received within the ball receiving hole and supported on the seat, there is provided an improvement constituted by a recess formed in the bottom surface of the ball receiving hole, the recess having at least one angular portion, the ball supporting seat being deformed to fill all the corners of the bottom of the hole including the recess, thereby preventing the ball supporting seat from rotating in the bottom surface of the ball receiving hole.
    Type: Grant
    Filed: February 15, 1979
    Date of Patent: November 4, 1980
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Eishiro Nakagawa, Taketoshi Miyamoto, Naozi Umino, Hirosi Oyama
  • Patent number: 4225256
    Abstract: A pen nib provided with a slit for liquid inks, in which the front end of the nib is at its underside provided with a ball-point tip which extends substantially perpendicular to the writing plane, and the ball bed of which is associated with the slit in the nib in an ink transmitting manner.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: September 30, 1980
    Assignee: Montblanc-Simplo GmbH
    Inventors: Jurgen Rosler, Gunther Herrnring
  • Patent number: 4198172
    Abstract: An angled ball tip for viscous fluid applicators which is adapted to be used with a hand-held reservoir for applying paints and other viscous fluids to cloth, wood, and the like, including a hollow housing and a spring-loaded ball disposed within said hollow housing. Pressure placed on the ball when coming into contact with a cooperating surface causes the ball to recede allowing the viscous fluid to flow around the surface of the ball and deposit on the surface.
    Type: Grant
    Filed: April 20, 1978
    Date of Patent: April 15, 1980
    Assignee: Tri-Chem de Puerto Rico, Inc.
    Inventor: Ira P. Meislik
  • Patent number: 4195941
    Abstract: A marking pen comprises a hollow cylindrical ink reservoir and a removable writing tip. It may also include a pressure means which, upon hand actuation, applies pressure to the viscous ink within the reservoir. The writing tip (nozzle) is a hollow plastic member having an internal flange to position a spring and means to hold a hollow cylindrical metal member. The spring is held between the flange and a ball, the ball partly protruding from the orifice of the inwardly flanged valve-type seat of the metal member.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: April 1, 1980
    Assignee: Mark-Tex Corporation
    Inventor: Sidney D. Barlow
  • Patent number: 4189066
    Abstract: A container provided with a dispensing closure comprising a cavity-containing ball rotatable in the neck of the container, a resilient retaining ring holding the ball in contact with the neck, and a locking ring thereover threadable on the neck.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: February 19, 1980
    Assignee: Bristol-Myers Company
    Inventor: Walter G. Berghahn
  • Patent number: 4168128
    Abstract: An improved dual-seal, wide-surface roller-type dispensing package combination for cosmetics and the like. A wide-surface dispensing roller is held in place in a fitment which is adapted to be attached to the finish portion of a container for the product to be dispensed. The dispensing roller is allowed to revolve within the fitment to facilitate uniform dispensing and application of the contents of the container. The total package is completed by a closure which is adapted to snap into engagement with the container. A primary seal is formed between the dispensing roller and the fitment upon application of the closure. The closure also includes a quantity of resilient material, such as a foamed polymer, positioned to contact the dispensing roller and the fitment to form a secondary seal to prevent leakage of product when the closure is placed into engagement with the container.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: September 18, 1979
    Assignee: Owens-Illinois, Inc.
    Inventors: William E. Fillmore, George V. Mumford
  • Patent number: 4164377
    Abstract: An improved, dual-seal, ball-type dispensing package combination for cosmetics and the like. A dispensing ball is held in place in a fitment which is adapted to be attached to the finish portion of a container for the product to be dispensed. The ball is allowed to move freely within the fitment to facilitate uniform dispensing and application of the contents of the container. The total package is completed by a closure which engages threads on the exterior of the finish portion of the container. The closure, fitment, and ball cooperate to create a seal between the fitment and ball at two separate locations to prevent leakage of product when the closure is placed into full engagement with the container.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: August 14, 1979
    Assignee: Owens-Illinois, Inc.
    Inventors: Richard D. Lohrman, George V. Mumford
  • Patent number: 4140411
    Abstract: An improved, preassembled ball-type dispensing package combination for cosmetics and the like. A ball is held in place in a fitment which is adapted to be attached to the finish portion of a container for the product to be dispensed. The ball is allowed to move freely within the fitment to facilitate uniform dispensing and application of the contents of the container. The total package is completed by a closure which engages threads on the exterior of the finish portion of the container. The fitment and closure include engaging portions which are adapted to retain the fitment in a preassembled position within the closure for shipping and handling. However, when the combination closure, fitment and ball are placed in engagement with the container finish portion, the retentive engagement between the fitment and the closure may be overcome to allow the fitment and ball to remain on the container when the closure is removed.
    Type: Grant
    Filed: September 30, 1977
    Date of Patent: February 20, 1979
    Assignee: Owens-Illinois, Inc.
    Inventors: Paul W. Harbauer, Richard D. Lohrman, George V. Mumford
  • Patent number: 4139313
    Abstract: Disclosed is a writing element for use in a ball point pen comprising a ball seat member which supports a ball on a ball seat disposed at its tip end and an outer sleeve which is fitted over the ball seat member to keep the ball on the ball seat. Said outer sleeve is slidably fitted to the ball seat member so as to be frictionally engaged with the ball seat member to be slid rearwardly by the extent to which the ball seat has been worn due to the writing pressure acting on the sleeve.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: February 13, 1979
    Inventor: Jiro Hori
  • Patent number: 4116569
    Abstract: A ball holder for a ball-point pen is arranged to have a ball socket with a ball seat having a plurality of convex surfaces formed on concave shoulder surfaces. A writing ball inserted in the ball socket is supported by a single ball contact point on each of the ball seat convex surfaces. Concavities are provided between adjacent convex surfaces and shoulder surfaces for collecting and supplying ink to a surface of the writing ball.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: September 26, 1978
    Assignee: The Gillette Company
    Inventors: Meuriel Francis Reed, Curtis Lawrence Malm
  • Patent number: 4077727
    Abstract: New ball point pen ink compositions are utilized to enhance the performance and very substantially extend the service life of ball pen ink cartridges by preventing the formation of an ink flow-blocking mass at the entrance to the brass or bronze nib or a mass which prevents the movement of the follower plug in a copper alloy cartridge. This is accomplished by dispersing in the ink proper one or more additives effective to prevent oxygen and moisture, which enter the cartridge and pass into the ink, from reacting with the metal constituents of the cartridge assembly to form metallic ions which react with ingredients of the ink proper in the formation of a flow-blocking mass.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: March 7, 1978
    Assignee: Gordon S. Lacy
    Inventors: Steven H. Kramer, Glenn F. Roquemore, James J. Joyce
  • Patent number: 4061430
    Abstract: A socket structure for a ball point refill, which comprises a ball made of corundum and arranged inside an outer supporting shell provided in its interior with a compound bearing consisting of a backing shell having a hardness exceeding 800 kg/sq.mm Vickers and an inner lining facing the ball and having a hardness of less than 200 kg/sq.mm Vickers.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: December 6, 1977
    Assignee: Montblanc-Simplo GmbH.
    Inventor: Heinz Gunther Herrnring
  • Patent number: 3960455
    Abstract: A flexible double ball-point pen of special construction to permit writing characters and lines of different thicknesses and styles and changing the style of writing at will. The pen is provided with a flexible joint of compressible and expandable material responsive to the amount of pressure and direction of movement of the user's hand and also having a pair of ball-point balls in communication with an ink supply of any standard composition used in ball-point pens and held by a dimple formation in an ink-containing tube adjacent the writing end of the pen. The remainder of the ball-point pen may be of standard or conventional construction.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: June 1, 1976
    Inventor: Max Balassiano
  • Patent number: 3945735
    Abstract: A socket for holding the writing ball of a ball point pen comprising an outer tubular member having a circular cross section and an inner tubular member having an elliptic or circular cross section, wherein an ink-conducting chamber or chambers are defined between the inner peripheral wall of the outer tubular member and the outer peripheral wall of the inner tubular member, thereby enabling ink to be conducted smoothly from an ink cartridge provided in the ball point pen through the chambers to the writing ball.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: March 23, 1976
    Assignee: The Sailor Pen Co., Ltd.
    Inventors: Koso Nakashiki, Akira Yoshimoto, Kazuhiko Osaki