FR2612842A1 - WRITING OR COATING INSTRUMENT WITH A LIQUID PRODUCT - Google Patents

Abstract

A WRITING OR COATING INSTRUMENT WITH A LIQUID PRODUCT INCLUDING A LIQUID RESERVOIR 17, A VALVE DEVICE MOUNTED BETWEEN THE RESERVOIR AND A WRITING OR COATING ELEMENT 13, A PISTON PLATE 19 HAVING A ROD 18 DIRECTED TOWARDS L '' REAR, PROJECTING IN THE LIQUID TANK AND HAVING THREADS 21, THE PISTON PLATE BEING MOUNTED IN A WAY NOT TO BE ABLE TO TURN AROUND THE AXIS BUT TO BE ABLE TO SLIDE IN THE AXIAL DIRECTION SEALED 26 FREELY SCREWS ONTO THE PISTON ROD THREADS AND HAS A GROOVE 25 FOR CAM WITH PREDETERMINED CIRCUMFERENTIAL INTERVALS, A CAM ROLLER 31 AT ITS TOP IN CONTACT WITH THE CAM GROOVE, AND A COMPONENT OF A PERCUSSION 32 MOUNT IN A WAY THAT CANNOT TURN AROUND THE AXIS OF THE AXIAL CYLINDER 6 BUT IN A WAY TO BE ABLE TO MOVE FREELY IN THE AXIAL DIRECTION.

Description

1. The present invention relates to a writing or writing instrument

  coating with a liquid product such as ink, beauty product, paint,

medication, adhesive.

  Certain types of instruments of the prior art include valve devices for controlling the rate of supply of a liquid product to a coating element. However, it is extremely difficult to continuously discharge the liquid product to a

  constant flow through the valve device

  eg, each time a de-

  charge. The object of the present invention is to solve this problem while still allowing a

  predetermined quantity of a liquid product during each

  that discharge operation. Another subject of the present invention is a novel writing or coating instrument 2. with a liquid product, of simple construction

and of low cost.

  According to the present invention, a writing instrument

  ture or coating with a liquid product comprises: - an axial cylinder, - a liquid reservoir, - a writing or coating element,

  - a valve device mounted between the tank

  see liquid and writing or coating instrument

is lying,

  - a piston plate mounted in the tank -

  see liquid being waterproof and being able to slide

  freely move in the axial direction, without being able to

  ner around the axis, the plate comprising a rod of pis-

  your thread protruding backwards, - a cam body fixed in rotation by screwing in the threads of the piston rod, this body being provided with a cam groove having ribs or hollows in

  predetermined intervals in the circumferential direction

  , - and a percussion body having a cam roller which engages in the groove, placed so as not to be able to rotate around the axis of the cylinder but capable of

  move in the axial direction.

  The present invention will be well understood when

  of the following description made in conjunction with

  attached drawings in which: Figure 1 is a central sectional view of a marking instrument according to the present invention; Figure 2 is an oblique view of a body of

  percussion of a marking instrument based on the fig-

  re 1; Figure 3 shows a sectional view along line III III of Figure 1; Figure 4 is a partial view, exploded in 3. plan of the marking instrument illustrated in Figure 1; Figure 5 is a sectional view taken along

line V-V in Figure 1.

  The present invention is described in detail in connection with the drawings which show a marking instrument. However, the present invention is not

  limited to this embodiment.

  In the drawings, an axial cylinder 6 functions-

  ne in straight ink tank. This cylinder 6 com-

  takes at its front end a protruding cylinder 1 of

smaller diameter.

  Threads 3 are formed on the exterior surface.

  re of cylinder 1, on which is screwed an upper barrel 15. In the upper barrel 15, a covering element

  13 has a projecting base 14 having a rim.

  The covering element 13 is supported between the part

  inner step of the barrel 15 and a guide ring 12 my-

  at the top of cylinder 1. The coating element

  tement 13 overflows, at its upper part, from the upper fat

laughing 15.

  The small diameter cylinder 1 communicates with

  the axial cylinder 6. A valve device with a seat

  valve ge 4 having the limit openings of the two elements is mounted in the cylinder 1. The valve device comprises a valve stem 9 having a flange

  chamfered 8 intended to be seated on the valve seat

  pe 4, a spiral spring 10 to cushion the rear end on the flange 8 of the valve stem 9 and a guide ring 12 supporting the front end of the

  spring 10 in its rear end. The guide ring

  ge 12 has a communication hole 11 into which the front end of the valve stem 9 is inserted, at its central part, and fixed in the front end of the

cylinder 1.

  On the inner surface of cylinder 6, four

2 61 842

  4. grooves 5 extend along a predetermined length from the rear end in the axial direction,

  around the circumferential direction, following in-

equal angular tervals.

  A circular seat 17 of spring is in one piece with the axial cylinder 6. The seat 17 has a

  central hole 29 in which there are two central projections

trales 16.

  An ink tank 7 is placed at the front of the

spring seat 17.

  A plate 19 forming a piston is mounted inside the

  ink tank 7, being movable in the axial direction. An O-ring 20 is inserted on the

  outer periphery of the plate 19, so as to

  seal the gap formed with the inner wall of the reservoir 7. The ink is stored on the front side of the

piston plate 19.

  A piston rod 18 extends from the center

  be of plate 19, and extends backwards in

  passing through the central hole 29 made in the seat 17.

  Threads 21 are formed on the outer periphery

  of the piston rod 18. At a part of the external periphery of the rod 18, a groove 22 is formed at a position corresponding to the projections 16, from which it follows that the rotation of the piston rod 18 is then prevented that the projections 16 of the seat 17 (see

  Figure 5) are engaged in the groove.

  A cylindrical body 26 forming a cam is screwed

  in rotation on the threads 21 of the piston rod 18.

  On the outer periphery of the body 26, there is a

  groove 25 for cam, in the shape of a sawtooth, which pre-

  feels repeated ribs and hollows in inter-

  predetermined valleys in the circumferential direction

(see figure 4).

  In the outside of the piston rod 18, a percussion element 32 is inserted. The element 32 comprises a cylindrical body 30 and a cylindrical base 28

  located in the rear part and surrounding according to an in-

  constant terstice the cylindrical body 30. The cylindrical body

  drique 30 is connected to base 28 at one of its ends

  your. On the outer surface of base 28, there are four

  tre axial projections 27 whose position corresponds to the grooves 5 formed in the axial cylinder 6. The number of grooves 5 and projections 27 may be greater or

less than 4.

  At the front end of the main body 30 and of the percussion element 32, there is a cam roller 31 in

  protruding plate shape with direct projections

  inwards at two opposite places in the di-

  circumferential section (see Figure 2).

  The percussion element 32 is inserted so that the piston rod 18 engages in the central hole 29 of the main body 30 from the rear opening of the axial cylinder 6, while the projections 27 enter the grooves 5 and the projections of the cam roller 31 are

  engaged in groove 25 after assembly.

  A percussion spring 33 is inserted for provo-

  quer a thrust of the percussion element 32 in the rearward direction, between the spring seat 17 and

the percussion element 32.

  Each element constituting the marketing instrument

  quage can be realized, for example in synthetic resin

  that, as is known in the prior art.

  When the percussion element 32 is pushed in the direction of the front by the percussion operation against the spring 33, the projections

  cam roller 31, abut against the wall of a rai-

  angle inclined in the axial direction of the groove 25 6. from which the element 26 rotates. As the intervals

  predetermined in the circumferential direction of the nerves

  the grooves or hollows in groove 25 are constant, the ele-

  ment 26 undergoes a rotation at a predetermined angle, during each percussion operation. With the body 26 having rotated by a predetermined angle, the piston rod 18

  engaged in this body cannot rotate but advances next

  before a predetermined distance. During the movement

  advancement of the piston rod 18, the plate 19 for-

  mant piston moves forward in the fuel tank

  cre 7 of the same distance. The ink stored in the reservoir

  see 7 is pressurized during the advancement of the plate 19, while there is thrust from the valve stem 9 towards

  the front, from where the valve seat 4 opens, the passage

  age of a predetermined quantity of ink and its supply

  to the covering element 13. When a predetermined amount-

  mined ink is discharged from the valve, the pressure in the ink tank 7 decreases while there is again closing of the valve seat 4 by the valve spring 10. When the impact pressure is stopped applied to element 32, it is brought back

  by the spring 33 when it returns to its original state.

  The present invention is not limited to the example embodiments which have just been described, it

  is on the contrary subject to modifications and

  laughing who will appear to those skilled in the art.

261 28 4

7.

Claims (1)

  1 - Writing or coating instrument   with a liquid product, characterized in that it comprises   takes: - an axial cylinder (6); - a liquid reservoir (7); - a writing or coating element (13);   - a valve device located between the tank   see liquid and the writing or coating element, - a piston plate (19) mounted in the   liquid tank being waterproof and able to slide   be free in the axial direction, but without power   rotate around the axis, the piston plate comprising   as a threaded rod (18) projecting rearward,   - a cam body (26) fixed in rotation by screwing   age on the threads (21) of the piston rod, the body   being provided with a cam groove (25) having ribs   res or depressions in predetermined intervals in the circumferential direction, and a percussion element   (32) having a cam roller (31) which engages in the groove   re, placed so that it cannot rotate around the cy-   lindric axial but able to move in the direction axial tion.