Work Files Saved Searches
   My Account                                                  Search:   Quick/Number   Boolean   Advanced       Help   


 The Delphion Integrated View

  Buy Now:   Buy PDF- 47pp  PDF  |   File History  |   Other choices   
  Tools:  Citation Link  |  Add to Work File:    
  View:  Expand Details   |  INPADOC   |  Jump to: 
 
 Email this to a friend  Email this to a friend 
       
Title: US5072493: Apparatus for drawing plastic film in a tenter frame
[ Derwent Title ]


Country: US United States of America

View Images High
Resolution

 Low
 Resolution

 
47 pages

 
Inventor: Hommes, William J.; Hockessin, DE
Keegan, Jr., John J.; Wilmington, DE

Assignee: E. I. Du Pont de Nemours and Company, Wilmington, DE
other patents from E. I. DU PONT DE NEMOURS AND COMPANY (165265) (approx. 15,067)
 News, Profiles, Stocks and More about this company

Published / Filed: 1991-12-17 / 1990-11-13

Application Number: US1990000611634

IPC Code: Advanced: B29C 55/16; B29C 55/20;
Core: more...
IPC-7: D06C 3/08;

U.S. Class: Current: 026/072;
Original: 026/072;

Field of Search: 026/072,73,89,92

Priority Number:
1988-06-22  US1988000209910

Abstract: Apparatus and method for producing a novel drawn film by propelling individual carriages along opposed loops from a first speed abutted in stacks in carriage collection sections to a second speed space apart in a drawing section of a tenter frame and to a third speed in stack forming sections where the carriages return to the first speed in the stacks. First primaries positioned adjacent one part of each loop develop electromagnetic waves for engaging synchronous secondaries attached to active carriages to provide controlled spacing of such carriages, and second primaries adjacent another part of the loop develop other electromagnetic waves for engaging hysteresis secondaries attached to active and to passive carriages to provide controlled abutting of the carriages.

Primary / Asst. Examiners: Schroeder, Werner H.; Calvert, John J.

INPADOC Legal Status: Show legal status actions          Buy Now: Family Legal Status Report

       
Related Applications:
Application Number Filed Patent Pub. Date  Title
US1988000209910 1988-06-22       


       
Parent Case:     This is a division of application Ser. No. 07/209,910, filed June 22, 1988.

Designated Country: AT BE CH DE FR GB IT LI LU NL SE  AU BR DK EP FI JP KR NO SU 

Family: Show 23 known family members

First Claim:
Show all 2 claims
We claim:     1. An apparatus for drawing a web of plastic film by propelling individual carriages having tenter clips attached thereto at predetermined speeds in opposed loops defined by a pair of carriage guide tracks positioned opposite each other, using linear motors, such apparatus includes:
  • first elongated primaries positioned opposite each other on forward sides of the loops;
  • second elongated primaries positioned opposite each other on return sides of the loops;
  • a plurality of active carriages guided around the tracks, each having a synchronous secondary attached thereto positioned adjacent the first primaries for propelling the active carriages, synchronously, in pairs, at predetermined speeds, in a film processing section of the tenter frame to draw the film gripped by the tenter clips;
  • each of the active carriages further having a hysteresis secondary attached thereto positioned adjacent the second primaries for propelling the active carriages in and through stack forming sections and into stacks of carriages on the return sides of the loops.


Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 52 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (52)   |   Backward references (10)   |   Citation Link

Buy
PDF
Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 4pp US2698967  1955-01 Reichel   Production of regenerated cellulose films and sheets
Get PDF - 14pp US3148409  1964-09 Bruckner   Material treating machine
Get PDF - 6pp US3150433  1964-09 Kampf   Stretching machine
Get PDF - 5pp US3261903  1966-07 Carr   Method and apparatus for film stretching
Get PDF - 37pp US3803466  1974-04 Starkey  Rockwell International Corporation LINEAR MOTOR PROPULSION SYSTEM
Get PDF - 9pp US3890421  1975-06 Habozit  La Cellophane Method for biaxially drawing plastic films
Get PDF - 5pp US3916491  1975-11 Kampf  Firma Erwin Kampf Maschinenfabrik Tenter clip machine for biaxially stretching thermoplastic film
Get PDF - 9pp US3930098  1975-12 Araki et al.  Nitto Boseki Co., Ltd. Method of molding fiber reinforced plastic flat plates
Get PDF - 10pp US3932919  1976-01 Hutzenlaub  Erwin Kampf Maschinenfabrik Improved gripper return means for a machine for simultaneously biaxially stretching thermoplastic film
Get PDF - 8pp US4384392  1983-05 Allen  Mobil Oil Corporation Apparatus for the biaxial orientation of a deformable sheet material
       
Foreign References:
Buy
PDF
Publication Date IPC Code Assignee   Title
Buy PDF FR2317076 1977-02  B29C 55/16 CELLOPHANE SA DISPOSITIF AMELIORE D'ETIRAGE DES FILMS DE MATIERE PLASTIQUE 
  JP48038779 1973-10       


Other Abstract Info: DERABS C90-022449

Other References:
  • Article from the 28th IEEE Vehicular Technology Conference, Denver, Colo., Mar. 22-24, 1978, entitled, "The Evolution of a Linear Induction Motor People Mover System", by William Watkins and Mel Black, WED Enterprises, Walt Disney Productions.


  • Inquire Regarding Licensing

    Powered by Verity


    Plaques from Patent Awards      Gallery of Obscure PatentsNominate this for the Gallery...

    Thomson Reuters Copyright © 1997-2014 Thomson Reuters 
    Subscriptions  |  Web Seminars  |  Privacy  |  Terms & Conditions  |  Site Map  |  Contact Us  |  Help