Instrument for measurement of vacuum in sealed thin wall packets
Abstract
An instrument for the measurement of vacuum within sealed packets 12, the packets 12 having a wall 14 sufficiently thin that it can be deformed by the application of an external vacuum to small area thereof. The instrument has a detector head 18 for placement against the deformable wall 14 of the packet to apply the vacuum in a controlled manner to accomplish a limited deformation or lift of the wall 14, with this deformation or lift monitored by the application of light as via a bifurcated light pipe 20. Retro-reflected light through the light pipe is monitored with a photo detector 26. An abrupt change (e.g., a decrease) of retro-reflected light signals the wall movement such that the value of the vacuum applied through the head 18 to achieve this initiation of movement is equal to the vacuum Within the packet 12. In a preferred embodiment a vacuum reference plate 44 is placed beneath the packet 12 to ensure that no deformation occurs on the reverse surface 16 of the packet. A packet production line model is also described.
- Inventors:
-
- 117 Oklahoma Ave., Oak Ridge, TN 37830
- 3727 Frostwood Rd., Knoxville, TN 37921
- 949 Wishbone Cir., Lexington, KY 40502
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 868943
- Patent Number(s):
- 5249454
- Assignee:
- Kollie, Thomas G. (117 Oklahoma Ave., Oak Ridge, TN 37830);Thacker, Louis H. (3727 Frostwood Rd., Knoxville, TN 37921);Fine, H. Alan (949 Wishbone Cir., Lexington, KY 40502)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- instrument; measurement; vacuum; sealed; wall; packets; 12; 14; sufficiently; deformed; application; external; detector; head; 18; placement; deformable; packet; apply; controlled; manner; accomplish; limited; deformation; lift; monitored; light; via; bifurcated; pipe; 20; retro-reflected; photo; 26; abrupt; change; decrease; signals; movement; value; applied; achieve; initiation; equal; preferred; embodiment; reference; plate; 44; placed; beneath; ensure; occurs; reverse; surface; 16; production; line; model; described; preferred embodiment; reflected light; light pipe; controlled manner; light signal; light signals; detector head; production line; sealed packets; deformable wall; deformation occurs; wall packets; /73/356/
Citation Formats
Kollie, Thomas G, Thacker, Louis H, and Fine, H Alan. Instrument for measurement of vacuum in sealed thin wall packets. United States: N. p., 1993.
Web.
Kollie, Thomas G, Thacker, Louis H, & Fine, H Alan. Instrument for measurement of vacuum in sealed thin wall packets. United States.
Kollie, Thomas G, Thacker, Louis H, and Fine, H Alan. Fri .
"Instrument for measurement of vacuum in sealed thin wall packets". United States. https://www.osti.gov/servlets/purl/868943.
@article{osti_868943,
title = {Instrument for measurement of vacuum in sealed thin wall packets},
author = {Kollie, Thomas G and Thacker, Louis H and Fine, H Alan},
abstractNote = {An instrument for the measurement of vacuum within sealed packets 12, the packets 12 having a wall 14 sufficiently thin that it can be deformed by the application of an external vacuum to small area thereof. The instrument has a detector head 18 for placement against the deformable wall 14 of the packet to apply the vacuum in a controlled manner to accomplish a limited deformation or lift of the wall 14, with this deformation or lift monitored by the application of light as via a bifurcated light pipe 20. Retro-reflected light through the light pipe is monitored with a photo detector 26. An abrupt change (e.g., a decrease) of retro-reflected light signals the wall movement such that the value of the vacuum applied through the head 18 to achieve this initiation of movement is equal to the vacuum Within the packet 12. In a preferred embodiment a vacuum reference plate 44 is placed beneath the packet 12 to ensure that no deformation occurs on the reverse surface 16 of the packet. A packet production line model is also described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}