DE2017852A1 - Device for dust-free refilling of magnetic powder storage containers - Google Patents

Description

Dipl.-Phys. Leo Thul

Patent attorney

7 Stuttgart -30. '

Short street 8:,

F.P. Mason - F.A.O, Waren - 78-2

Creed S Company Limited, Brighton, Sussex, England.

Device for dust-free refilling of map; net powder storage containers.

The invention relates to a device for dust-free filling of the magnetic powder storage container from to magnetic 3asis working pressure and display devices, consisting of a filler neck and one of the filler opening adapted, sealed refill container,

The one that occurs especially in pressure equipment of the aforementioned type Consumption of magnetic powder as "printing ink" requires a supplement to the powder supply at certain intervals,

Since the magnet powder suitable for such purposes is extremely fine-grained it tends to form dust-like clouds when it is poured over, as is the case with a refilling process. Without special precautions, this leads to pollution of the device and the operator, not to mention the loss of the relatively expensive magnetic powder. . ■

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009845/1303 bad original

FP Mason - FAO Goods 78-2 2017 852

The object of the invention is to avoid the above-mentioned power cables or to reduce to an acceptable Ma ^a.

This is achieved according to the invention because. ⁰ a one-piece or multi-part rin ' ⁷ -shaped magnet is embedded in the wall of the filler neck and that the refill container is opened mechanically when it is inserted into the opening of the filler neck.

This ensures that the '-'a cannot escape from the refill container is only possible after it has been placed on the filler neck and that through the in the filler opening q is effective ·? The same magnetic field causes the whirled-up magnetic powder particles to emerge is largely prevented when the filler neck is open.

On the basis of an exemplary embodiment, the invention is connected explained in more detail below with the drawings. In the Drawings show:

1 is a perspective view, shown in section, of a filler neck for a ¹³ UIverbehält.

Fig. 2 is a sectional view of the filler neck according to Fig. 1.

As the drawings show, there is a filler neck 1 in the wall 2, e.g. of a storage container for magnetic powder let in, which belongs to a magnetic 3based printing and / or display device. The filler neck 1 consists from a ring attachment 3 with a conically narrowing opening and a tubular main body 4 narrowing downwards,

009845/1303

BATH ORIGINAL

F. ¹³ 'Mason - FA-0. - 'aren 78-2 -J-- -χ- "■"' ■

This connected to a unit parts 3 and 4 can consist of ^ü plastic material. A lid 13 is used as a closure
(Fig. 2) is provided, which is locked by a bayonet catch '.

A special refill container 6 is provided for refilling the powder supply. This is in its lower part of the opening. 9 adapted to the filler neck and provided at the end with an outlet nozzle 7, which is normally sealed by a locking piston 8 under spring tension. In the cement of the opening 9, a stop stamp 10 protrudes upwards, V7elcher is fastened in a support cross 11, which in turn forms a unit with a retaining ring 12. The unit can be molded in one piece from a plastic material. When attaching the Hachfüllbehälters 6 on the nozzle 1, the punch 10 penetrates into the ^; Outlet port 7 and
presses the locking piston 8 against its suspension
above. In this way, the! ■ ag net powder in the refill container 6 can flow into the storage container. The piston 8
closes again automatically when the container 6 is lifted off.

During the filling process, the falling Magnetic powder creates a cloud-like whirling up of the bulk material inside the storage container. To an escape of the whirled up To prevent or reduce magnetic powder if the Refill container 6 is lifted and until the cap is screwed on, switchable magnetic means are in the Filling opening 9 is provided through which the. whirled up Magnetic powder particles attracted in the opening area and thus are caught,

009845/1303

BATH ORIGINAL

F.P. Mason - F.A.O. Goods 7 8-2

In the present exemplary embodiment, these magnetic means consist of an annular electromagnet 14 which, arranged between the ring attachment 3 and the retaining ring 12, surrounds the filling opening 9. The excitation of the winding 15 of the electromagnet I ¹ + takes place automatically when the cover 13 is removed and it is interrupted again when the cover is put back on. This process is controlled by a switch (FIG. 2) which is actuated by the cover 13.

When the electromagnet 14 · is energized, the up to the opening 9 magnetic powder particles from poles 17 and IB of the Electromagnets attracted and prevented from stepping out, In order to prevent the powder particles from penetrating the magneti ^ icklunR, is a sleeve 19 covering the magnet made of non-magnetizable material Material provided. The powder adhering to the sleeve 19 therefore falls back into the storage container when the Cover 13 is put back on and thus the excitation of the electromagnet 14 via the switch 16 is interrupted.

During the refill process, i.e. with the container attached 6, its outlet connector 7 extends into the opening 9 to below the electromagnet 14. The magnetic powder thereby arrives

only within the nozzle 7 under the influence of the magnetic field. The weight of the magnetic powder in the refill 6. ensures that this magnetic field does not prevent the powder from leaking out. The influence of the Magnetic field on the interior of the nozzle 7 can, however, be reduced by the latter made of a material of high ma ^ -

009845/1303 - ⁵ ~

BATH ORIGINAL

F, P, Mason · F, A, 0. Goods 7-8-2

Netic conductivity is established, creating the interior

against the magnetic field, is shielded.

Another option is the magnetic field in a borrowed manner-wie.'through the cover 13 each with the placement of the Turn off the refill container 6 on the nozzle 1. When the container is removed, it is automatically switched on again , ■:

There are of course other embodiments, it is possible "Thus," B, conceivable, instead of the switchable electromagnet an ent · "talking controllable permanent magnet which operates using" the principle of known .magnetischen chuck for machine tools _t d "h. using a loading? movable shielding »As prescribed, the switching process can either be triggered by the cap or, if necessary, by the refill container, except that in this case it is a mechanical switching process.

The automatic on and off of the magnetic means is of course not an absolute necessity. He can do this " f or lichenfa.1 Is also done manually by the person, which does the flat filling.

6 claims

1 Bl, drawings! % Fig.

009845/1303 _R bad original

Claims (1)

F. P. Mason - E, A.O. Goods 78-2 Claims flJ Device for the dust-free refilling of the magnetic powder storage container of magnetic-based pressure and / or display devices »consisting of a filler neck and a closed refill container adapted to the filler opening, characterized in that in the wall of the filler neck (1) a one-part or multi-part ring-shaped magnet is let in and that the "Refill container (6) when inserted into the opening (9) of the The filler neck (1) is opened mechanically. 2 * A device according to claim 1 "characterized in _t that the magnet is designed as an electromagnet (14). 3. Device according to claim 1 and 2, characterized in _t that the excitation of the electromagnet (It) via a switch (IS) is switched off, and that this switch is operated by the closing of the filler neck (1) by means of a lid * (13) t. Device according to claim. 1 and 2, characterized in that _t off the excitation of the magnet (It) with the plugging of the container (6) on the neck (1) or is shielded. 009841/1303 '. BATH ORIGINAL F.p .-; Hason - 'F.A.O. Goods 78-2 5. Device according to claim 1, 2 and U, characterized «that the refill container (6) is provided with an outlet nozzle (7) and that this nozzle (7) in the region of the magnet (14) consists of a material of high magnetic conductivity. δ. Device according to claim 1 and 51, characterized in that the opening of the outlet nozzle (7) is closed by a spring-loaded piston (8), that a stop rod (10) is arranged in the middle of the filler opening (9) of the filler nozzle (1) and that this stamp (10) protrudes into the outlet port (7) when refilling. 10 ". 4.19 70 0098A5 / 1303 BATH ORIGINAL Blank page