US3467477A - Marking device - Google Patents

Marking device Download PDF

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Publication number
US3467477A
US3467477A US653273A US3467477DA US3467477A US 3467477 A US3467477 A US 3467477A US 653273 A US653273 A US 653273A US 3467477D A US3467477D A US 3467477DA US 3467477 A US3467477 A US 3467477A
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US
United States
Prior art keywords
tube
marking
barrel
marking device
ink
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
US653273A
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English (en)
Inventor
Hans Litzka
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.)
Gunther Wagner Pelikan Werke GmbH
Original Assignee
Gunther Wagner Pelikan Werke GmbH
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
Application filed by Gunther Wagner Pelikan Werke GmbH filed Critical Gunther Wagner Pelikan Werke GmbH
Application granted granted Critical
Publication of US3467477A publication Critical patent/US3467477A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/18—Arrangements for feeding the ink to the nibs
    • B43K5/1818—Mechanical feeding means, e.g. valves; Pumps
    • B43K5/1827—Valves
    • B43K5/1836—Valves automatically closing
    • B43K5/1863—Valves automatically closing opened by actuation of the rear-side of the pen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/16—Pens with writing-points other than nibs or balls with tubular writing-points comprising a movable cleaning element

Definitions

  • An applicator unit is mounted on one end of the barrel and comprises at least two small tubes which coaxially surround one another and of which at least the inner communicates with the marking fluid supply, the outer tube being axially movable with respect to the inner tube and surrounding the same with slight clearance so that its front face can be advanced into the plane of the front face of the inner tube, or forwardly therebeyond, thereby varying the cross-sectional area of the open front end of the fluid supply passage through which fluid escapes, and thus varying the width of a mark made with the marking device.
  • the present invention relates generally to marking devices, and more particularly to marking devices having a small tube which defines a passage from which the marking fluid issues. Still more particularly, the present invention refers to a drafting pen.
  • marking devices of the general type outlined above, and particularly in drafting pens it is known to provide a barrel which contains in an internal chamber thereof a supply of marking fluid, which for the sake of convenience will hereafter be referred to as ink.
  • a small tube which is arranged so as to extend axially of the barrel and to have its front end project outwardly therebeyond.
  • the rear end of the tube communicates with the ink supply within the barrel and the ink thus can issue from the front end of the tube.
  • the width of the marking which can be made with this type of marking device is substantially identical with the maximum dimension of the cross-sectional area at the outlet of the tube; that is, the diameter in the case of a cylindrical tube.
  • pens Such marking devices, for the sake of brevity hereafter .called pens, have been found generally to be very satisfactory. They do, however, suffer from some drawbacks, one of which is the fact that the width of the marking which can be made with this type of pen is fixed and can never be varied. Thus, if a marking of different width is to be made, then it is necessary to use a different pen having a tube whose outlet has a cross-sectional area different from the pen used before. This, of course, is a decided disadvantage because it is at best burdensome, and frequently entirely impossible to keep changing from one pen to another whenever the width of the marking has to be varied, an occurrence which is rather frequent particularly in drafting.
  • the present invention provides a marking device which is free from the disadvantages just outlined.
  • the marking device according to the present invention is so constructed that the width of the marking which can be produced with it may be varied at the will of the user.
  • my novel marking device disclosed herein is not subject to reduction or termination of ink flow, as known from the prior art, resulting from encrustations formed by pigment, despite the fact that my novel marking device utilizes a fluid-passage defining tube.
  • the device according to the present invention is simple in its construction, and is therefore inexpensive both to manufacture and to sell.
  • a marking device such as a drafting pen
  • the barrel unit is conventional and defines an inner chamber adapted to contain a supply of marking fluid.
  • the applicator unit differs from what is known. It is mounted on one end of the barrel unit and comprises first means which define a fluid passage communicating with the chamber and which exteriorly of the barrel unit has an outlet of predetermined cross-sectional area.
  • my applicator unit also comprises second means which is associated with the first means and which is operative for varying the cross-sectional area of the outlet of the fluid passage.
  • FIG. 1 is a somewhat schematic longitudinal section through a marking device in accordance with my present invention
  • FIGS. 2, 3 and 4 are respective detail views of the components which together make up the applicator unit in accordance with my present invention and employed in the marking device shown in FIG. 1;
  • FIG. 5 is a detail view of the rear end of the marking device shown in FIG. 1.
  • FIG. 1 I provide a conventional barrel 10 which may consist of hard rubber, synthetic plastic material, or another suitable material.
  • the barrel 10 defines an interior chamber 11 which can accommodate a body of marking fluid, such .as ink, India ink, or the like. Secured in the open front end of the barrel 10, as
  • FIG. 1 is an applicator unit consisting of the elements 12, 16 and 19.
  • FIG. 2 illustrates the element 12 more clearly and shows that it consists of a substantially cylindrical rear portion provided with an external screw threads 12a and a forwardly tapering front portion.
  • the member 12 is hollow, as is clearly evident from FIG. 2, and a tube 13 of small cross-sectional area extends through the open tip of the member 12, coaxially therewith in the illustrated embodiment, such that the rear portion of the tube 13 is received within the member 12.
  • the open front end portion of the barrel 10 is internally screw-threaded and, as clearly visible in FIG. 1, the member 12 is threaded into the barrel 10 in mating engagement of its screw threads 12a with the internal screw threads provided on the barrel 10.
  • the hollow interior of the member 12 communicates with the inner chamber 11 of the barrel 10 and receives from this chamber the marking fluid or ink contained therein.
  • This ink can escape through the tube 13 in the manner well known from the art, and it is of course evident that as the ink escapes from the front end of the tube 13, the marking which will be made in this manner will have a width corresponding substantially to the cross-sectional area of the tube, that is to the diameter of the tube if the same is cylindrical.
  • FIG. 3 shows a second member, designated with reference numeral 16, which has a general configuration remi niscent of the configuration of the member 12, Or rather of the forwardly tapering front portion thereof, and that front portion is in fact receivable within the hollow space within the interior of the member 16.
  • the member 16 At its open front end the member 16 carries a second small tube, identified with reference numeral 17, whose cross-sectional area is somewhat larger than that of the tube 13 and which, if the tube 13 is received in the tube 17, surrounds the tube 13 with some clearance.
  • the configuration of the hollow interior of the member 16 must be such that it can accept the frowardly tapering front portion of the member 12 if the tube 13 is to be received within the tube 17. With such configuration provided the member 16 can he slid over the forwardly tapering front portion of the member 12 without any difficulty and quite freely.
  • the interior of the member 16, that is the inwardly facing circumferential wall surface bounding the hollow interior of this member, is provided with projecting ridges 18 and FIG. 2 shows that the front portion of member 12 is provided with a stepped section 14 which is formed with axially extending grooves 15.
  • the ridges 18 are each received in one of the grooves 15, thus making possible axial movement of the member 16 with respect to the member 12 while preventing rotational movement of the members with reference to one another.
  • FIG. 4 This provision by itself constitutes a considerable advancement over the known drafting pens of this type.
  • I enhance the versatility of my novel marking device still further by providing an additional member 19, illustrated in FIG. 4.
  • Provision of the member 19 makes possible markings having an even greater width than those which can be made utilizing the tube 17.
  • Member 19, it will be seen, again corresponds substantially in its outline to the members 12 and 16; it is so configurated that its hollow interior is capable of accepting freely the member 16.
  • the member 19 again carries a tube, here identified with reference numeral 20, and the cross-sectional area of the tube 20 is greater than the cross-sectional area of the tube 17 so that, when the latter extends into the tube 20, the tube 20 will surround the tube 17 with some clearance.
  • the member 19 is internally screw-threaded, such thread being indicated with reference numeral 21 and being adapted to mesh with the external screw thread 12a on the cylindrical rear portion of the member 12.
  • FIG. 1 shows that one portion of the screw thread 12a mates with a correseponding screw thread in the interior of the front portion of the barrel 10, as discussed previously, and another portion of the screw thread 12a mates with the screw thread 21 on the member 19, as just pointed out.
  • the member 19 is secured to the member 12 and thereby to the barrel 10.
  • the member 19 comprises in its interior one or more axially extending grooves 22.
  • the member 16 on the other hand, is provided with one or more radial projections 23 on its outer circumferential surface, one of these projections 23 have been shown in dotted lines as optional.
  • the projection or projections 23 will be received in the complementary grooves 22 and the interior of the member 19.
  • These latter grooves 22 merge with an inner circumferential groove 24, as is clearly evident from FIG. 4, and from this groove 24 there branch off what I prefer to call riser grooves 25, whose number is complementary to the number of grooves 22 and accordingly to the number of projections 23.
  • riser grooves 25 is shown in FIG. 4 in dotted lines, and again it should be recalled that this is because the one radial projection 23 in FIG. 3 has been designated as optional so that accordingly the corresponding riser groove 25 is also optional.
  • the projections 23 are received in the complementary grooves 22 and that, as the member 19 is turned by virtue of the mating screws 21 .and 12a, the projections 23 will move in the circumferential grooves 24 as long as the member 19 is turned in one direction of rotation.
  • the axial movement resulting from meshing of the threads 21 and 12a during such movement causes advancement of the member 16 until the open end of its tube 17 is located in the plane of the open end of the tube 13, that is fiush therewith, or until it even projects beyond the open end of the tube 13. If the marking device according to the present invention is used to produce a mark in this condition of adjustment, the width of this mark will be greater than the width of a mark produced with the tube 13 alone.
  • the projections 23 enter the riser grooves 25 resulting in relative displacement of the members 19 and 16 in such a manner that the open front end of the tube 20 becomes flush with or extends forwardly beyond the open front end of the tube 13, whereby it is the cross-sectional area of the tube 20 which is determinative of the width of the marking produced in this condition of adjustment.
  • the width of the marking will be greatest with this position of adjustment of the embodiment illustrated here by way of example, because the cross-sectional area of the tube 20 is the largest of the three tubes shown.
  • a needle 26 extends through the innermost tube 13, that is the tube having the smallest cross-sectional area and constituting the actual ink passage.
  • This needle 26 is axially reciprocable within the tube 13, and such reciprocation is already known in the art.
  • the purpose of it is to break up and destroy encrustations which form within the tube 13 .as the ink dries therewithin and pigment builds up on .the inner wall of the tube 13. This is particularly bothersome in the case of India ink which has a tendency to dry very quickly and to form very significant encrustations.
  • the present invention provides, as is evident from FIGS.
  • a rod 27 carries at its front end the needle 26 (compare FIG. 2) and at its rear end a pushbutton portion 28 which extends outwardly through the opening 10a and beyond the barrel 10.
  • the opening 10a is bounded, as evident from FIG. 5, by an inner circumferential surface which diverges in the direction inwardly towards the chamber 11 and that section of thepushbutton portion 28 which is actually located within the confines of the opening 10a is bounded by an outer peripheral surface 29 complementary to the inner circumferential surface bounding the member 10a.
  • the rod 27 Inwardly of the pOrtion 28 the rod 27 carries a disk-shaped portion 30 and an expansion spring 31, which surrounds a part of the rod 27, abuts both against the disk-shaped portion 30 .and against a wall portion 10b of the barrel 10, permanently urging the rod 27 away from the applicator unit, that is permanently urging the surface 29 into sealing abutment with the peripheral surface bounding the opening 10a-
  • a sealing element 32 for instance an O-ring of rubber or synthetic plastic material, is arranged inwardly of the opening 10a intermediate the same and the disk-shaped portion 30, surrounding a section of the rod 27 and serving to enhance the sealing action at the opening 10a.
  • the barrel 10 is assumed to comprise an end cap which is screw threaded onto the rear end portion of the barrel and which defines with the wall 10b thereof the small auxiliary chamber in which the members 30, 31 and 32 are located.
  • the barrel 10 is so obvious from the drawing, and particularly from FIG. 5, that the provision of separate reference numerals for this feature are not believed necessary. In any case, this does not constitute a part of the present invention, it being evident that it is immaterial how the arrangement shown in FIG. 5 is introduced into the rear end portion of the barrel 10.
  • a marking device particularly a drafting pen, comprising, in combination, a barrel defining an inner chamber adapted to contain a supply of marking fluid; and an applicator unit mounted on one end of said barrel and comprising three superimposed funnel-shaped members arranged along a common axis with each other and movable relative to each other in axial direction, each of said members having an open ended axially extended tubular outlet of different diameter so that the tubular outlet of one of said members forming the innermost of said three members may be received with clearance in the tubular outlet of a second of said three members forming an intermediate member and the tubular outlet of the latter may be received with clearance in the tubular outlet of the third member forming the outermost of the three members, said first member being fixedly connected to one end of said barrel so that said chamber communicates with the interior of said first member and fluid contained in said chamber may pass through the fluid passage defined by the tubular outlet of said first member, connecting means for connecting said third member to said first member turnably about said axis and movable in axial direction relative to
  • a marking device as defined in claim 1; further comprising a needle member received in said inner tube axially reciprocable in said fluid passage; and manually actuable means carried by said barrel unit exteriorly thereof and operatively associated with said needle member for enabling reciprocation thereof at the will of an operator, whereby to destroy encrustations of marking fluid pigment in said fiuid passage.
  • said barrel unit comprises another end spaced from said one end and provided with an aperture communicating with said chamber; and further comprising an assembly for destroying encrustations of marking fluid pigment which form in said passage, said assembly including a first member located in said barrel and having a needle portion received in said inner tube, and a second member rigid with said first member sealingly received in said aperture and having an engaging portion extending outwardly-of said aperture and reciprocable between a rest position in which it extends outwardly and an operative position in which it is displaced in inward direction, movement of said engaging portion between said position effecting reciprocation of said needle portion, and biasing means permanently biasing said second member to said rest position thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
US653273A 1966-07-15 1967-07-13 Marking device Expired - Lifetime US3467477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0042565 1966-07-15

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US3467477A true US3467477A (en) 1969-09-16

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CH (1) CH463314A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535049A (en) * 1969-02-05 1970-10-20 Dike Inc Extendible-retractible pen having interior vent and capillary passage cleaning means
US3756729A (en) * 1972-06-26 1973-09-04 W Tufts Dispensing applicator
WO1987001338A1 (en) * 1985-09-04 1987-03-12 Mazhar Shah Dispenser for a liquid containing volatile component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1131287A (fr) * 1955-09-16 1957-02-19 Dispositif de plume tubulaire pour écriture au pochoir
US2891512A (en) * 1955-05-25 1959-06-23 Kovacs Theodor Fountain pens
US3336909A (en) * 1966-01-14 1967-08-22 Harvey E Diamond Variable-diameter pen nib

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891512A (en) * 1955-05-25 1959-06-23 Kovacs Theodor Fountain pens
FR1131287A (fr) * 1955-09-16 1957-02-19 Dispositif de plume tubulaire pour écriture au pochoir
US3336909A (en) * 1966-01-14 1967-08-22 Harvey E Diamond Variable-diameter pen nib

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535049A (en) * 1969-02-05 1970-10-20 Dike Inc Extendible-retractible pen having interior vent and capillary passage cleaning means
US3756729A (en) * 1972-06-26 1973-09-04 W Tufts Dispensing applicator
WO1987001338A1 (en) * 1985-09-04 1987-03-12 Mazhar Shah Dispenser for a liquid containing volatile component

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Publication number Publication date
CH463314A (de) 1968-09-30

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