公开(公告)号：US3867900A

公开(公告)日：1975-02-25

申请号：US38008873

申请日：1973-07-17

Applicant: PHILIPS CORP

Inventor： VAN OSTERHOUT GERARD WILLEM ,  LEMMEN VHENDRIKUS JOHANNES ,  KLOMP CORNELIS JOHANNES

IPC: B05C5/02 ,  B05D3/04 ,  B05D7/04 ,  G11B5/842 ,  H01F10/00

CPC classification number: B05D7/04 ,  B05C5/0254 ,  B05D3/0486 ,  G11B5/842

Abstract: A device for coating a support of a synthetic material with a layer of a lacquer for particular use in manufacturing magnetic tape. The device includes a pouring slit through which the lacquer is forced into a pressure chamber formed on its upper side by the support base. The lacquer is temporarily stored in the pressure chamber. Means are provided for tensioning the support and causing it to be guided along the stored lacquer. A smoothing side is arranged downstream from the chamber and the support with the adhering layer of lacquer is guided along the smoothing side in such manner that the parts of the support in front of and behind the smoothing side form an angle. The pressure in the pressure chamber can be controlled by controlling the angle, the tensile stress and the quantity of lacquer supplied per unit of time so that the thickness of the layer is also controlled.

Abstract translation: 用于涂覆合成材料的支撑体的装置，其具有特别用于制造磁带的漆层。 该装置包括倾倒狭缝，通过该倾倒狭缝，漆被强制进入其上侧由支撑基部形成的压力室。 漆被临时储存在压力室中。 提供了用于张紧支撑件并使其沿着存储的漆引导的装置。 平滑侧布置在室的下游，并且具有粘合层的支撑件沿着平滑侧被引导，使得在平滑侧前后的支撑部分形成一个角度。 压力室中的压力可以通过控制角度，拉伸应力和每单位时间内提供的漆量来控制，以使层的厚度也受到控制。

公开(公告)号：US3627509A

公开(公告)日：1971-12-14

申请号：US3627509D

申请日：1970-04-01

Applicant: PHILIPS CORP

Inventor： GIESSEN AART ANTONIE VAN DER ,  KLOMP CORNELIS JOHANNES

IPC: B22F9/22 ,  C21B13/00 ,  H01F1/047 ,  H01F1/06 ,  B22F9/00

CPC classification number: C21B13/008 ,  H01F1/065 ,  Y02P10/136

Abstract: THE INVENTION RELATES TO A METHOD OF PREPARING METAL POWDERS MAINLY CONSISTING OF IRON AND MEANT FOR MAGNETIC RECORDING BY REDUCTION OF AN IRON OXIDE OR AN IRON OXIDE HYDRATE AND IS CHARACTERIZED IN THAT A MEASURED UANTITY OF SILVER IS PREVIOUSLY DEPOSITED ON THE MATERIAL TO BE REDUCED. AS A RESULT OF THIS THE REDUCTION SPEED IS ALSO CONSIDERABLY INCREASED SO THAT THE REDUCTION OCCURS AT SPEEDS WHICH CAN BE USED IN PRACTICE ALSO AT TEMPERATURES LOWER THAN THOSE AT WHICH SINTERING OF THE FORMED METAL PARTICLES WHICH IS DISTURBING FOR THE APPLICATION IN VIEW TAKES PLACE.

公开(公告)号：US3598568A

公开(公告)日：1971-08-10

申请号：US3598568D

申请日：1969-01-29

Applicant: PHILIPS CORP

Inventor： KLOMP CORNELIS JOHANNES ,  OOSTERHOUT GERARD WILLEM VAN

IPC: G11B5/706 ,  H01F1/06 ,  B22F9/00

CPC classification number: H01F1/065 ,  G11B5/70615 ,  G11B5/70668

Abstract: A METHOD OF PREPARING MAGNETICALLY STABLE IRON POWDER SUITABLE FOR MAGNETIC RECORDING IN WHICH IRON OXIDE HYDRATE, A-FEOI(OH) IS PRECIPITATED FROM A STRONGLY REACTING ALKALINE SOLUTION OF FERROUS HYDROXIDE CONTAINING AT LEAST ONE COMPOUND OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM, TIN AND ALUMINUM IN SUCH A CONCENTRATION THAT THE ATOMIC RATION OF THE LATTER METAL TO FE IN THE SOLUTION IS A LEAST 0.005 WHILE PASSING AN OXIDIZING GAS THROUGH THE SOLUTION. THE PRECIPITATE IS THEREAFTER SEPARATED FROM THE LIQUID, WASHED, DRIED, AND REDUCED IN HYDROGEN AT 250* TO 500* C.

公开(公告)号：US3679476A

公开(公告)日：1972-07-25

申请号：US3679476D

申请日：1970-04-01

Applicant: PHILIPS CORP

Inventor： OOSTERHOUT GERARD WILLEM VAN ,  LEMMEN HENDRIKUS JOHANNES ,  KLOMP CORNELIS JOHANNES

IPC: B05C11/04 ,  B05C5/02 ,  B05D3/04 ,  B05D7/04 ,  G11B5/842 ,  G11B5/848 ,  H01F10/00

CPC classification number: B05C5/0254 ,  B05D3/0486 ,  B05D7/04 ,  G11B5/842 ,  Y10S428/90

Abstract: A METHOD OF COATING A SUPPORT BASE OF A SYNTHETIC MATERIAL, WITH A LAYER OF LACQUER FOR PARTICULAR APPLICATION IN MANUFACTURING MAGNETIC TAPE. THE LACQUER IS FORCED THROUGH A POURING SLIT INTO A PRESSURE CHAMBER WHERE IT IS TEMPORARILY STORED IN CONTACT WITH THE SUPPORT BASE. THE SUPPORT IS GUIDED ALONG THE STORED LACQUER UNDER A TENSILE STRESS AND THE SUPPORT WITH THE ADHERING LAYER OF LACQUER IS THEN GUIDED ALONG A SMOOTHING SIDE IN SUCH MANNER THAT THE PARTS OF THE SUPPORT IN FRONT OF AND BEHIND THE SMOOTHING SIDE FORM AN ANGLE SO THAT THE LAYER IS EQUALIZED. THE PRESSURE IN THE PRESSURE CHAMBER CAN BE CONTROLLED BY CONTROLLING THE ANGLE, THE TENSILE STRESS AND THE QUANTITY OF LACQUER SUPPLIED PER UNIT OF TIME SO THAT THE THICKNESS OF THE LAYER IS ALSO CONTROLLED.

公开(公告)号：US3607220A

公开(公告)日：1971-09-21

申请号：US3607220D

申请日：1969-02-26

Applicant: PHILIPS CORP

Inventor： VANDERGIESSEN AART ANTONIE ,  KLOMP CORNELIS JOHANNES

IPC: B22F9/22 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/06 ,  B22F9/00

CPC classification number: H01F1/065 ,  G11B5/70615

Abstract: Iron powder suitable for use as a magnetic recording medium is prepared by first subjecting a finely divided iron oxide or oxyhydrate such as Alpha -Fe203, gamma -Fe203, Alpha -Fe00H, gamma -Fe00H or Fe304 to the action of a 0.002 to 1 molar solution in water of stannous chloride and thereafter reducing the iron oxide or oxyhydrate, preferably in hydrogen, followed by stabilizing the iron powder thus obtained.