DE7036058U - ELECTROSTATIC WET TONER DEVICE. - Google Patents

Description

Case DN-327 QH

PATENT ADVOCATE DIPL ^ INQ. QERHARD SCHWAN »MÖNCHEN f - QOtXZEX ST) IASSE is

"ί. Sep. 19? 0

GAF Corporation 140 meat 51 Street ,, New »York, New * York 10020 / U.St.A.

Electrostatic toner device

The invention is concerned with electrostatic wet copiers and particularly relates to a liquid developer toner device for such devices.

When using known electrostatic NaÖtonara equipment the copies obtained often have unwanted stains or other surface defects, rope when going through the development facility not filled in Blldbaraichs

The invention is based on the object, sire tait a liquid Developer to create working goal organization »the delivers fra copies of stains or other surface fragments, one has high efficiency in practical operation, is simple in structure and easy in sinaci to manufacture flawless copies or suitable condition.

This task is performed with an electrostatic wet toner device development of a latent image.

or web-shaped, sensitized copying material in a liquid Developer solution according to the invention solved in that curved upper and lower u / annen are provided under formation a curved guideway for moving from the front inlet to the rear outlet of the guideway

UiGySriuS nCpxSrniäbSrxäx 1Π πυουαΰυ ϋυδΓσιΓισπυόΓ 5Πς / 5ΟΓυΠ5 ι, sxfTu,

that the upper tub on its underside carries an ICetallic surface serving to intensify the development of the image and in its Front wall has a horizontal row of openings that a conveyor is present, which the front part of the The upper trough is continuously filled with developer in such a way that it passes through the openings in the inlet area of the guideway above the copier material facing with the layer side up and running through directly below the surface Cascading flows, and that the rear wall of the lower tub with a horizontal row of slots for drainage excess developer is provided in the outlet area of the guideway. The one through the front wall openings of the upper men Liquid toner solution falling through it like a cascade hits the copy facing up, pushing the copy down and away from the metallic underside the upper UJanne, resulting in a clean copy that has no stains or other surface defects. The direction of flow of the liquid toner solution is within the guideway the same as the direction of movement of the copy. IBäforend the copy by the Tof. redemption in the immediate vicinity to the metal surface on the underside of the upper ÜJanns

I passes between the image areas of the copy and

Jf of the metal surface generates reinforced lines of force, which for it

; ensure that the image areas on the copy are well filled.

I The invention is described below on the basis of an exemplary embodiment

Γ ομχσΐο XIf iftiALTAirtJUliy iiixt, · ucr χ ltctj. .Liayorruatf aoi-uinruffq rtuiiui. w ^ -

I purify. The single figure shows a schematic perspective

.j see view of an electrostatic built according to the invention

ΐ see wet toner setup.

f llJie illustrated is an elongated box-like

ί Reservoir 1G intended for the liquid toner solution 12-

I The storage container 10 has a relatively large front

I is shell 14 and a slightly smaller rear shell 16 that

i below a front pair of U-rollers 18, 20 or one behind

l ren pair of squeezing salts 22,22 'are arranged · One in the

j tray 14 stored clear clay solution (isopar G) becomes! at

'■ θΐηβπ tables with the toner solution 12 prevented, the solution eird

t is removed from the shell 14 by means of a pump 25.

I In the upper part of the storage container 10 is a downward

The curved lower U-shaped 26 is mounted, in the rear edge of which an equal row of slots 28 is formed, through which the liquid overflows from the tub 26 into the rear shell 16, through which the surface 30 of the liquid flows onto a

held at the desired level. To the storage container

* One is essentially similar above the lower UJaine 26

I 703605828.1.71

«It» ·

Forsjte qBkröaiats obers Hanns 32 attached. One üJand 34 divided dia cbera banns 32 in a larger front part 36 for receiving its supply of the liquid toner solution and one of its rear part 38. Tonal solution 12 is by means of a Puaps 37 constantly from the reservoir 10 to the part 36 d ££ - Sänne 32 carries and runs across an equal row of rectangular openings 40 in the forehand of the upper hanne 32 over.

The underside 42 of the upper string 32 consists either of a metalized plastic or an aetallic component, among other things to ensure a silk reinforcement; it lies at a distance from the lower sane 26 and forms a downward and upward ggkröaatsn house 44 or a guideway for the non-illustrated copy paper that enters on the front and exits on the back »« ie this by the thick arrows 46 and 43 is indicated. The Baus 44 also contains the

liquid tone solution, which is the operation of the facility in the |

same direction in which the copy is moving. j

Ια operation is a preprocessing solution from the tray 14 · from θ insta spray tube 24 supplied and from this directly on the underlying rait wire-wound roller 18 is sprayed. The unillustrated copy runs with the layer side

after ohan between the drive roller 20 and the dosage trap 18 |

and «led thereby moistened and squeezed. The copy is |

then reaches directly into the hardly 44 filled with toner. ψ

ι · *> s * »a

The underside 42 of the obscure tub 32, which is made of metallized plastic or sines astallischsn sawn part, provides for an image intensification. IEall that the latent electrostatic Image-bearing copy paper in close proximity to the top Tray 32 is let through the liquid toner solution, Herds between the image areas of the copy and the rastaili— see underside 42 reinforced · lines of force developed. 01 « Reinforced feet ensure that the image on the Copy well filled in «earth.

Toner solution 12 is pumped from storage container 1Q into part 36 of upper tub 32. The solution then flowed over in a cascade-like manner through the openings 40 and falls onto the copy with the layer side up, whereby this is printed downwards and downwards from the underside 42 of the upper channel 32. As a result, a clean copy is obtained that has no stains or other surface defects. The copy continues δα the bottom ge'krüraatsn Raunses 44 until it exits from between the rollers 22 and 22 *.

Squeezed off toner solution is collected by the rear tray 16 and returned to the clay reservoir 10. The overflow slots 28 allow excess toner solution to be conveyed via the rear scarves 16 to the storage container 10 after the toner solution has cleared the curved fluff 44 in the same direction as that flowed through the copy paper.

Claims (1)

Expectations 1. Electrostatic Naßtonereinrichtung for developing sin latent image bearing sheet- or web-shaped, seitaiibilisiertem copy material in iiner flui * strength EntwicklerlöSüng, characterized * DSSS curved upper and lower iannen (32 _t 26) votgeathen that the form of a curved guide track for From the inlet 2Uffl at the front, the outlet of the guideway at the rear, the copying material is arranged at a distance on top of one another, so that the upper trough (32) on its underside (42) has a metal surface serving to intensify the image development and in its foreground a horizontal row of Opening (40) has a conveyor (37) which continuously fills the front part (36) of the upper tub (32) with developer in such a way that it passes through the openings (40) in the inlet area of the guide track above the the layer side facing upwards and running straight below the surface ermaterial constantly flows in cascade, and that the rear wall of the lower ti / anti e (26) having a uiaagrechten R _B ihe of slots (28) of the guide path for dissipating excess developer in the outlet y & rsahsn ISFC * ss e »-t, w s a 2ο Electrostatic wet toner device according to claim 1, characterized by a device (18, 20, 24) for pre-moistening the copier material before it enters the guideway. Electrostatic wet toner device according to claim 1 or claim 2, characterized in that immediately below the lower U / anns (2S) an elongated rectangular cold = is arranged in the form of a development reservoir (10), which has a rear shell (16) 2Ui · receptacle for the excess developer, via the slots (28) in the The edge of the rear wall of the lower tub (26) flows out. 4. Electrostatic wet toner device according to claims 2 and 3, characterized in that the storage container (1D) has a front shell (14), above which the urethane device (18, 20, 24) is arranged and the catches excess urine-wetting agent. \ 5 "Electrostatic Naßtonereinrichtung according to claim 4, characterized in that the Vorbefeuchtungseinrichtung aufu / ei8t, of which one beiuickelt two coming with the copy material in drive connection rollers (18,20) with wire ' is that above the wire beujic! <elten lilalze (18) a Spray tube (24) is arranged and that a device (25) is available, the Entiuickler from the storage container (10) ! pumps to the spray lance. • * 8th - 6. Electrostatic wet toner device according to one of the claims 2 to 5, characterized in that above the outlet of the guide track two with the copy material in Drive connection coming nip rollers (22,22 *) like this are arranged that squeezed-off excess developer falls into the rear tray (iß). 7. Electrostatic wet toner device according to one of the previous claims, characterized in that the Underside (42) of the upper UJannä (32) and the top the lower tub (26) are curved arcuately and are concentric to one another in the taesantlichan. 8. Electrostatic wet toner device according to one of the preceding Claims, characterized in that the metal surface present on the underside (42) of the upper trough (32) is electrically charged. 9. Electrostatic wet toner device according to one of the preceding Claim, characterized in that the slots (28) of the lower trough (26) are above the liquid level Lie in the upper sänne (32).