FR2612843A1 - VALVE DEVICE FOR A WRITING OR COATING INSTRUMENT WITH A LIQUID - Google Patents

Abstract

A VALVE DEVICE 12 FOR A WRITING OR COATING INSTRUMENT WITH A LIQUID MATERIAL INCLUDES A PISTON MEANS OF A VALVE STEM 4 FORMING A PISTON AND A SPRING SEAT 1 IN THE FORM OF A CYLINDER, THE CYLINDER HAVING AN OPENING WHICH ALLOWS THE PISTON TO ENTER AND EXIT AND THE STRUCTURE OF WHICH ALLOWS ITS PROGRESSIVE EXTENSION.

Description

1.

  The present invention relates to an improvement

  of a valve device in a writing instrument

  re or coating with a liquid material such as ink, a beauty product, a drug, a paint, an adhesive.

  In the prior art, with a valve device

  pe of this type, in order to control the supply of the liquid by passing it from a reservoir to a writing or coating element placed at the top 13 of the instrument, sometimes a piston means is used in

  which a piston rod is used as a piston and a seat

  spring age works in cylinder.

  With a valve device having such a con-

  truction, the rim 3 (Figure 4) of the rear end of a cylinder 2 forming the seat 1 of a spring is cut

  by being substantially perpendicular to the axis. Therefore

  quent, when the piston 1 'of the rod 4 is inserted in 2. the cylinder 2, according to the prior art, the pressure prevailing in the cylinder 2 increases suddenly while there is a rapid discharge of a large amount of liquid. If a high volume of liquid is discharged as described above, the liquid often drips from the coating or writing element, which obviously constitutes a drawback. The present invention provides a writing or coating instrument with a liquid material, which can provide the liquid in a moderate manner while gradually increasing the discharge rate, which

  helps prevent liquid dripping.

  According to the present invention, a device to support

  pope includes a piston means in a valve stem

  eg with a cylinder acting as a spring seat; one or

  groove in the cylinder, in which the piston enters and leaves, opens gradually to control the flow

  lu liquid entering the writing or rev-

seriously.

  23 One possible way to gradually open the

  the cylinder is to provide a changeable cut

  slowed down in this opening. Another possible way is to build a groove whose depth becomes

  progressively less and less in the direction

  tion of the inner wall of the opening. Another possible method is to structure the inside diameter

  near the opening so that it is pro-

  gressively larger in the outward direction.

  The present invention will be well understood during the

  following description made in conjunction with the drawings below

  seals in which: Figure 1 is an oblique view of a valve device according to the present invention; Figure 2 is an exploded plan view of a valve seat for a valve device according to the present invention; Figure 3 is a central sectional view of a marking instrument 10 using the valve device of Figures 1 and 2; Figure 4 is an oblique view of a device

valve of the prior art.

  We will now describe, in conjunction with the

  sins, an embodiment of the present invention. This-

  during, the present invention is not limited to this mode

of achievement.

  In Figure 1, there is shown a seat 1 of res-

  comes out for a valve device 12, mounted in a cylinder

  dre 2. A chamfered cut 3 is provided in the

  rear tie of cylinder 2 through which a valve stem passes

  4. The spring seat 1 has a rib 16 extending

  between the chamfered upper part located between the

  cylinder 2 and cutout 3 at the rear of the cylinder

  dre 2 and a cylinder 1 'provided in the rear end of the rib 16. The top of the cylinder 1' supports a valve spring 23 10, while its hole contains the end

back of rod 4.

  According to the illustrated embodiment, the discovery

  pe 3 is provided in three positions spaced the same distance in the circumferential direction. However,

  this number can be greater or less than three.

  FIG. 2 illustrates a sectional view taken from the outside to show the details of the composition of the cylinder 2, of the rib 16 and of the cylinder 1 'of the seat 1 of the spring, the view being taken from the outside after cutting

in the axial direction.

  The constitution of the other components of the pre-

  sent embodiment of the valve device is classified

  if that. Instead of a cut, we can consider a groove

  re whose depth gradually decreases in the di-

  rection of the front side of the inner wall at the rear end 4. of the cylinder 2. Such a groove is constructed up to an intermediate part of the cylinder 2. It can

  there is only one groove or we can plan more

  several grooves. The groove can be linear in the axial direction, or spiral. On the other hand, the inside diameter of the rear part of the cylinder 2 can be progressively larger towards the rear. In this case, it is important to create a stepped gap at the limit of the rib 16, which ensures the regularity of the movement of the rod.

valve 4.

  In FIG. 3, a marching instrument has been represented.

  using the valve device illustrated in Figures 1 and 2. In the instrument of Figure 3, an upper barrel 8 is screwed into the front end of an axial cylinder

  6 and is provided with a writing element 7. A tube 9 for purchasing

  slightly ink, fixed in an inner hole of the end

  anterior half of cylinder 6, provides ink

to writing element 7.

  At the open end of the cylinder 6, a cartridge type ink tank 13 is mounted and can move freely in the axial direction while being fitted with the valve device illustrated in FIGS. 1 and 2 at its

  open end. The rear end of the tube 9 is engaged.

  located in the front end of the valve stem 4.

  A cap 14 normally covers the writing element 7, and when using the instrument,

  is placed on the axial cylinder 6 for use in ele-

percussion ment.

  By striking the cap 14, the reservoir 13 of the ink cartridge type is driven forward. Valve stem 4 no longer moves when it strikes

  the rear end of the ink delivery tube 9.

  if, the valve device is open while the rod 4

  leaves the cylinder 2 forming the seat of the spring.

5.

  When you stop pressing the hat, the seat

  ge 1 of the spring is driven backwards under the effect of the valve spring 10. At this time, the piston part of the rod 4 enters the cylinder 2 of the seat 1. However, the piston part 5 first enters the cylinder through the cutout 3. Therefore, the ink has

  in the front side of cylinder 2 is gradually

  depending on the width of the cut.

  In the case where a groove is made in the plate

  this of the cut or in the case where the internal diameter of the cylinder is made larger, one obtains exactly the same effect as with the cut because the flow of the ink escaping during the pushing by the valve stem and the exit from the groove or gap present between the wall of the inner cylinder and the piston part of the

  valve stem gradually decreases.

  In FIG. 3, a fixing element 19 is vis-

  se to fix the valve device 12 in the front end of the liquid tank 13. An O-ring 20 prevents ink leakage by being placed between the element 19 and the valve seat 11 in closing contact with the surface outside of the tube 9. A seat 21 is placed between

  the tube 9 and the writing element 7 to form a groove

  re 22 to replace the air in the radial and circular directions

  conference. A ball 18 can move freely in the reservoir 13 to cause agitation of the liquid deposits. A rear plug 17 is fixed to the internal surface of the rear end of the axial cylinder 6, in order to prevent the exit of the reservoir 13. The constitution of these components, with the exception of the improved parts of cylinder 2 for the device to valve of the marking instrument illustrated in FIG. 3, is conventional in

prior art.

  Each component of the marking instrument of the present invention consists of materials and means 6.

known in the prior art.

  The present invention is not limited to the exemplary embodiments which have just been described, it is on the contrary liable to modifications and variants which will appear to those skilled in the art. 7.

Claims (4)

  1 - Valve device (12) for controlling   the rate of supply of liquid material to an ins-   writing or covering tool, characterized in that it comprises a piston means with a valve rod   pe (4) as a piston and a spring seat (1) in the form   cylinder me, the cylinder comprising an open part which allows the piston of the valve stem to enter and leave and whose structure allows its extension progressive.   2 - Valve device according to the claim   tion 1, characterized in that the opening comprises a chamfered cut (3).   3 - Valve device according to the claim   tion 1, characterized in that a groove is formed in the inner wall of the opening with a depth becoming progressively greater in the direction inside.   4 - Device according to claim 1, characterized in that the internal diameter near the opening is gradually greater in the direction from the outside.