公开(公告)号：CA454680A

公开(公告)日：1949-02-15

申请号：CA454680D

Applicant: WESTERN ELECTRIC CO ,  BELL TELEPHONE LABOR INC

Inventor： HUMPREY ROBERT G ,  EHRHARDT ROBERT A

公开(公告)号：US2429222A

公开(公告)日：1947-10-21

申请号：US48974443

申请日：1943-06-05

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A ,  HUMPHREY ROBERT G

IPC: H01L21/00 ,  H01L29/417

CPC classification number: H01L21/00 ,  H01L29/417 ,  Y10S428/929 ,  Y10S428/934 ,  Y10T29/49224 ,  Y10T428/12889

公开(公告)号：US3306830A

公开(公告)日：1967-02-28

申请号：US28755263

申请日：1963-06-13

Applicant: BELL TELEPHONE LABOR INC

Inventor： GUSTAV BITTRICH ,  EHRHARDT ROBERT A

IPC: C23C18/16 ,  C23C18/36 ,  H05K3/06 ,  H05K3/10 ,  H05K3/18 ,  H05K3/42

CPC classification number: H05K3/426 ,  C23C18/1605 ,  C23C18/1653 ,  C23C18/1689 ,  C23C18/36 ,  H05K3/062 ,  H05K3/108 ,  H05K3/181 ,  H05K2201/0344 ,  H05K2201/0347 ,  H05K2203/0723

公开(公告)号：US2753299A

公开(公告)日：1956-07-03

申请号：US35077153

申请日：1953-04-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A

IPC: C25D3/54

CPC classification number: C25D3/54

公开(公告)号：US2361680A

公开(公告)日：1944-10-31

申请号：US39858141

申请日：1941-06-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A

IPC: H01L21/16

CPC classification number: H01L21/168

公开(公告)号：US3863324A

公开(公告)日：1975-02-04

申请号：US43908054

申请日：1954-06-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A

IPC: B23P13/00 ,  B23P17/00

CPC classification number: B23P13/00 ,  Y10T29/4981 ,  Y10T29/49986

Abstract: 1. In a recording and reproducing apparatus employing a magnetizable tape secured at one marginal edge thereof to the peripheral surface of a circular member of nonmagnetic material, the method of forming said magnetizable tape on said circular member which comprises attaching to a lateral face of said circular member a ring of metal, machining the peripheral surfaces of said circular member and said attached metal ring in a single operation to form coextensive peripheral surface areas, applying a plating of magnetizable material to the peripheral surface areas of said member and of said ring and thereafter removing said metal ring to leave a width of magnetizable material attached to and overhanging one edge of said circular member.

Abstract translation: 在使用固定在其一个边缘上的可磁化带到非磁性材料的圆形构件的圆周表面的记录和再现装置中，在所述圆形构件上形成所述可磁化带的方法包括将所述可磁化带附接到所述非磁性材料的侧面 圆形构件是金属环，在单个操作中加工所述圆形构件和所述附接的金属环的周边表面以形成共同的外围表面区域，将可磁化材料的镀层施加到所述构件和所述环的周边表面区域，以及 然后移除所述金属环以留下附着到所述圆形构件的一个边缘并悬垂在所述圆形构件的一个边缘上的可磁化材料的宽度。

公开(公告)号：US3307972A

公开(公告)日：1967-03-07

申请号：US26406063

申请日：1963-03-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A

IPC: C23C18/40

CPC classification number: C23C18/405

公开(公告)号：US2321071A

公开(公告)日：1943-06-08

申请号：US39858241

申请日：1941-06-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： EHRHARDT ROBERT A ,  WRIGHT EDGAR E

IPC: H01L21/16

CPC classification number: H01L21/167 ,  Y10T29/43 ,  Y10T29/49149