E.i. Dupont De Nemours and Company

E. I. Du Pont De Nemours

Melvin H Johnson

Frank M Willis

Joseph Anthony Perrotto

Jerald D Lee

Jerry F Potter

James William Ashmead

Charles T Blaisdell

Jack Kent Nyquist

James Francis Ryley, Jr

Terry Robin Cain

Mark A Hackler

Maurice C Todd

Anandkumar R Kannurpatti

Stephen Cushner

James David Hamerslag

Calixto Estrada

Leland L Krauss

Robert Finley Drury

Li Lin

Edward J Delawski

David Anthony Belfiore

Jon Ovitt Stanley

Robert W Hooley

Robert Lee Brown

John Christopher Modla

Dennis Leslie Frost

Donald William Gillespie

Duncan Douglas McCabe

Edward Michael Boyle

Calvin Brooks Walker

Dirk Landman

John W Hunt

A method and apparatus for thermal processing a photosensitive element includes heating a composition layer on a flexible substrate to a melt temperature of an unirradiated area of the composition layer and maintaining the flexible substrate at a temperature below the melt temperature while pressing a heated absorbent layer against the heated composition layer, and repeating these steps for multiple cycles. A further embodiment of the method includes a step of cooling the flexible substrate and layer laminate on each cycle to maintain the flexible substrate at the desired temperature below that of the heated composition layer.

Method and apparatus for thermal processing a photosensitive element

The present invention is directed to: a non-interlacing expirating yarn bulker comprising a body having an enclosed yarn passage extending therethrough. The yarn passage includes an inlet region, a throat region and an expanding region. A single pressurized fluid channel extends through the body and intersects with the yarn passage in the throat region. Cross sectional areas at certain defined locations in the yarn passage exhibit predetermined relationships. In addition, the inlet region and the pressurized fluid channel both are symmetrical about a common reference plane of symmetry;

Single impingement bulking jet

A sensor for use with a yarn processing apparatus that includes at least one roll over at least a portion of the surface of which at least one yarn is conveyed is operative to generate an accumulation signal representative of a wrap accumulation of yarn circumferentially around the surface of the roll.

Wrap detection device

A baffle structure that includes a generally cylindrical portion and at least one generally linear portion is associated with each roll in a yarn processing. The generally cylindrical portion is spaced a predetermined clearance distance from the surface of the roll with which it is associated to define a generally curved channel about the roll. The generally linear portion of each baffle structure extends toward the other roll, with the generally linear portions overlapping each other to define a substantially linear channel between adjacent upstream and the downstream rolls. The generally linear portion extending from the cylindrical portion of the upstream roll toward the downstream roll has an edge thereon. The edge is disposed within a predetermined close distance of the surface of the upstream roll such that the edge lies within the boundary layer of air able to be generated about the upstream roll. The generally curved channels and the substantially linear channel cooperating to define a pathway that substantially encloses the warp array of yarns as the same is moved over and between the rolls. In operation, a substantially uniform transverse temperature is maintained across the pathway at each point therealong, and at least a portion of the heated air about the upstream roll is stripped therefrom as yarn is conveyed from the upstream to the downstream roll.

Heated enclosure

An integral structure is provided for chemical processing and manufacture, in which a plurality of laminae are joined together and having inlet and outlet ports connected by a three dimensionally tortuous channel. Chemicals are introduced through the inlet ports and processed along the channel, with desirable product withdrawn through the outlet ports. The laminae are of materials selected to be compatible with the chemical process, from the group consisting of elements of groups III, IV or V of the Periodic Table, ceramics, glasses, polymers, composites and metals. Processes of manufacture of the apparatus and processes utilizing the apparatus are also disclosed herein.

Integrated chemical processing apparatus and processes for the

A method for the preparation of optical ferrules containing cylindrical members utilizes a guide receiving the cylindrical member, a sleeve receiving a piston therethrough, and a pin extending into the sleeve. The method also includes biasing to position the piston, using fill gates to dispense polymer into a defined cavity, and employing a containment which secures the components together. Injection molded optical fiber ferrules made according to the apparatus and process exhibit superior properties.

Process for injection molding optical ferrules

Apparatus for the preparation of optical ferrules containing cylindrical members is disclosed. The apparatus utilizes guide means receiving the cylindrical member, a sleeve receiving a piston therethrough, and a pin extending into the sleeve. The apparatus also includes biasing means to position the piston, fill gates to dispense polymer into a defined cavity, and containment means which secure the apparatus components together. Injection molded optical fiber ferrules made according to the apparatus and process disclosed exhibit superior properties.

Injection molded optical ferrules and apparatus and processes for the

Measurement of stress-strain relationships in thin films using substantially flat, parallel test surfaces with minimal width.

Film testing

Apparatus for the preparation of optical ferrules

A positioning apparatus for positioning a point on a cylindrical member having a small diameter, such as an optical fiber, along a predetermined reference axis regardless of the outer diameter of the fiber.

Apparatus for positioning the center of an optical fiber along a

Optical fiber connector having an apparatus for positioning the center

A connector assembly for connecting an optical fiber cable to a socket may be used in field with the advantages of precision connection and testing found in a manufacturing facility. The optical fiber cable has a first end, and a first predetermined length of a first bare optical fiber extends from the first end. The connector assembly comprises a ferrule for holding a second optical fiber. The ferrule has a first end, a second end, a central axis extending between the first and the second end and a hole extending along the central axis. A first portion of the second optical fiber is disposed in the hole and a second portion of the second optical fiber extends from the first end of the ferrule. The connector assembly also comprises a device for splicing the second portion of the second optical fiber to the first predetermined length of the first bare optical fiber. A housing encloses the splicing device, the second portion of the second optical fiber and the first predetermined length of the first bare optical fiber. The housing provides strain relief for the first predetermined length of the first bare optical fiber and for the second portion of the second optical fiber.

Connector assembly for connecting an optical fiber cable to a socket

An opto-electronic component includes an opto-electronic device of either the edge or the surface active type mounted on a pedestal. A fiber is positionied by a positioning device apparatus. The positioning apparatus includes a superimposed first and a second arm. Each arm may be subdivided into a first and a second finger. The arms (and fingers) are fabricated from a crystalline material. The arms (and fingers) are biased toward a closed position. An optical fiber introduced into a channel defined by the superimposed arms is initially deflected so that a point on the end face of the fiber is placed into alignment with a reference axis. Further axial movement of the fiber through the channel causes the arms to move against the bias force to hold the point on the axis, regardless of the diameter of the fiber.

Opto-electronic component having positioned optical fiber associated

A package for an opto-electronic component and associated pigtail is characterized by a notch formed in the sidewall of an open topped lower housing portion which interrupts the edge of the housing such that the component can be laid into the housing with the pigtail extending through the notch.

Package for an opto-electronic component

Growing community of inventors

Chadds Ford, PA, United States of America

Melvin H Johnson