公开(公告)号：DE3475286D1

公开(公告)日：1988-12-29

申请号：DE3475286

申请日：1984-12-11

Applicant: IBM

Inventor： COHEN MITCHELL SIMMONS ,  PENNINGTON KEITH SAMUEL ,  SACHDEV KRISHNA GANDHI ,  WEBER WILLIAM DORSEY

IPC: B32B15/12 ,  B41M5/24 ,  B41N1/14 ,  D21H19/00 ,  D21H19/02 ,  D21H19/32

Abstract: For high speed electroerosion recording, this invention provides a polyorganosiloxane overlayer which includes high lubricity solid particles as a filler. The overlayer provides a combination lubricant and protective layer for the thin metal layer which is removed by electroerosion to prevent damage for the areas not removed by electroerosion. The polyorganosiloxane overlayer is preferably crosslinked, and is relatively hard, durable, and especially resistant to thermal degradation by the electroerosion arcing. This is important to avoid debris buildup at the recording electrodes resulting from the high temperature arcing for removal of the overlayer in the areas where recording takes place.

公开(公告)号：DE2817862A1

公开(公告)日：1978-12-14

申请号：DE2817862

申请日：1978-04-24

Applicant: IBM

Inventor： BEALL GREGORY WALTER ,  COHEN MITCHELL SIMMONS ,  KRYDER MARK HOWARD

IPC: G11C11/14 ,  G11C19/08 ,  H03K17/84 ,  H01F10/00

Abstract: SLM field access bubble devices which include at least one conductor crossing a bubble propagation path have severely limited operating margins (especially for small bubbles) for the bubble in the vicinity of the conductor. Apparatus and method for operating such a bubble device is disclosed which improves the device operation in this region. The improved apparatus and method provides an additional field source with a sense and magnitude to support the bubble when it reaches the conductor region. Such a field source, as disclosed, includes a current pulse in the conductor.

公开(公告)号：DE3580996D1

公开(公告)日：1991-02-07

申请号：DE3580996

申请日：1985-04-04

Applicant: IBM

Inventor： SACHDEV KRISHNA GANDHI ,  SHEAR STEPHEN ANTHONY ,  PENNINGTON KEITH SAMUEL ,  COHEN MITCHELL SIMMONS

IPC: B41M5/24

Abstract: Improved electroerosion recording media are described in which ablatable polymers are used in the electroerosion recording medium. This medium includes at least a substrate or support layer, a base layer which protects the substrate, a thin film of conductive material on the base layer and which can be eroded, and a protective overcoat layer. Ablatable polymers are used as binders in either the base layer or the top protective layer, or both, in order to provide advantages during electroerosion. These ablatable polymers undergo thermally induced depolymerization in such a way that the result is the formation of volatile monomeric or low molecular weight species as the predominant products, with little or no adherent residue.

公开(公告)号：DE3476356D1

公开(公告)日：1989-03-02

申请号：DE3476356

申请日：1984-11-27

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  COHEN MITCHELL SIMMONS ,  PENNINGTON KEITH SAMUEL ,  SACHDEU KRISHNA GANDHI

IPC: B41M5/24 ,  B41N1/14

Abstract: Electroerosion recording materials of superior scratch resistance are provided without the need for a lubricant overcoat by incorporating a hard, lubricating hydrophobic polymer layer between the support and the removable, thin conductive layer to reduce plastic deformation of the support under stylus writing pressure. The intermediate polymer layer provides a highly adhering surface for the overlying aluminum film and contains graphite fluoride and/or fluorocarbon resins such as Teflon R and hard particles such as silica. The materials may be used in various printing processes including making directly readable images, direct negatives and wear resistant offset printing masters.

公开(公告)号：DE3583520D1

公开(公告)日：1991-08-29

申请号：DE3583520

申请日：1985-03-13

Applicant: IBM

Inventor： SACHDEV KRISHNA GANDHI ,  AFZALI-ARDAKANI ALI ,  PENNINGTOU KEITH SAMUEL ,  COHEN MITCHELL SIMMONS

IPC: G06K15/14 ,  B41M5/24 ,  B41N3/03

公开(公告)号：DE3480389D1

公开(公告)日：1989-12-14

申请号：DE3480389

申请日：1984-11-27

Applicant: IBM

Inventor： AFZALI-ARDAKANI ALI ,  COHEN MITCHELL SIMMONS ,  PENNINGTON KEITH SAMUEL ,  SACHDEV KRISHNA GANDHI

IPC: B41M5/24 ,  B41N1/14 ,  H05K3/00 ,  H05K3/08 ,  H05K3/28

公开(公告)号：DE3476530D1

公开(公告)日：1989-03-09

申请号：DE3476530

申请日：1984-11-27

Applicant: IBM

Inventor： SACHDEV KRISHNA GANDHI ,  PENNINGTON KEITH SAMUEL ,  COHEN MITCHELL SIMMONS

IPC: G06K15/14 ,  B41M5/24

公开(公告)号：DE3376403D1

公开(公告)日：1988-06-01

申请号：DE3376403

申请日：1983-11-15

Applicant: IBM

Inventor： COHEN MITCHELL SIMMONS

IPC: B41M5/24 ,  B41N3/03 ,  G03F1/00 ,  B41C1/10

公开(公告)号：DE2828125A1

公开(公告)日：1979-01-11

申请号：DE2828125

申请日：1978-06-27

Applicant: IBM

Inventor： COHEN MITCHELL SIMMONS ,  PUGH EMERSON WILLIAM

IPC: G11C11/14 ,  G11C19/08 ,  H01F10/02

Abstract: These improved current controlled transfer switches are particularly useful for changing the propagation path of very small bubble domains without requiring large amounts of transfer current. The underlying principle is that the transfer operation occurs when the magnitude of the magnetic drive field used to move bubble domains has diminished to a small value, or is zero. This means that the magnetic field due to current in the switch does not have to overcome the effect of the drive field and therefore can be very small while still being effective. This is termed a "start/stop" operation and in one embodiment, current-assisted transfer is achieved by utilizing a change in the sequence of the magnetic drive field (generally an in-plane rotating field) at the time of transfer. In another embodiment, a continuous "three-quadrant" magnetic drive field is used instead of the customary 360 DEG rotating drive field. This three-quadrant field cycle is also the normal cycle for bubble storage operations and bubble motion elsewhere in the magnetic circuit is not disturbed by the switching operation because all devices are designed to operate with only one type of drive field cycle, which is the three-quadrant cycle. Switches operating in accordance with these principles do not have to have a particular design; in fact, several different designs are illustrated.