E.i. Dupont De Nemours and Company

Other

Robert J Santucci

Joseph E Koskol

Louis G Rosanio

Robert Anthony Marin

Pui-Yan Lin

Joseph J Duffy

Birol Kirayoglu

The present invention relates to an apparatus and a process for a half-cell structure to make a hexagonal-cell honeycomb core. The structure has a plurality of peaks and valleys and a diagonal surface between each consecutive peak and valley. The apparatus comprises a stack holder for stacking the structure so that as one sheet is placed on top of a stack comprising at least one sheet, the peaks of one sheet contact the peaks of an adjacent sheet. The apparatus also comprises an air blower disposed beneath the top of the stack for reducing the air pressure surrounding the stack to a pressure below the air pressure on the top of the stack, thereby pressing the layers together to form the core. The present invention also relates to a transfer head and a process for holding a half-cell structure. The transfer head comprises a plurality of support bars for supporting the half-cell structure and at least one space formed between each support bar, where the width of each space is about the distance between adjacent valleys of the structure, and the depth of the space is greater than the height of the peaks.

Transfer head for holding half-cell structure

The present invention relates to an apparatus and a process for a half-cell structure to make a hexagonal-cell honeycomb core. The structure has a plurality of peaks and valleys and a diagonal surface between each consecutive peak and valley. The apparatus comprises a stack holder for stacking the structure so that as one sheet is placed on top of a stack comprising at least one sheet, the peaks of one sheet contact the peaks of an adjacent sheet. The apparatus also comprises an air blower disposed beneath the top of the stack for reducing the air pressure surrounding the stack to a pressure below the air pressure on the top of the stack, thereby pressing the layers together to form the core.

Apparatus and process for stacking sheets of half-cell structure to make

A layered yarn package is formed of continuous filament yarn wads wherein the yarn alternates between compacted an extended lengths by axially compacting the yarn into a length, segmenting the length into alternating extended and compacted lengths then arranging the compacted lengths in a common axial direction one next to the other to form a layer. The layer may be compressed. One or more layers may form the package.

Apparatus and process for forming a wad of yarn

A layered yarn package is formed of continuous filament yarn wads wherein the yarn alternates between compacted and extended lengths by axially compacting the yarn into a length, segmenting the length into alternating extended and compacted lengths then arranging the compacted lengths in a common axial direction one next to the other to form a layer. The layer may be compressed. One or more layers may form the package.

Growing community of inventors

West Chester, PA, United States of America

Robert J Santucci