GB1459825A – Device and method for detecting the degree of vacuum in container for products such as food products
– Google Patents
GB1459825A – Device and method for detecting the degree of vacuum in container for products such as food products
– Google Patents
Device and method for detecting the degree of vacuum in container for products such as food products
Info
Publication number
GB1459825A
GB1459825A
GB4757974A
GB4757974A
GB1459825A
GB 1459825 A
GB1459825 A
GB 1459825A
GB 4757974 A
GB4757974 A
GB 4757974A
GB 4757974 A
GB4757974 A
GB 4757974A
GB 1459825 A
GB1459825 A
GB 1459825A
Authority
GB
United Kingdom
Prior art keywords
container
jar
vacuum
jars
transducer
Prior art date
1973-11-05
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4757974A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PLASMON SpA
Original Assignee
PLASMON SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1973-11-05
Filing date
1974-11-04
Publication date
1976-12-31
1974-11-04
Application filed by PLASMON SpA
filed
Critical
PLASMON SpA
1976-12-31
Publication of GB1459825A
publication
Critical
patent/GB1459825A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
G01M3/00—Investigating fluid-tightness of structures
G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
G—PHYSICS
G01—MEASURING; TESTING
G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G01L21/00—Vacuum gauges
G01L21/16—Vacuum gauges by measuring variation of frictional resistance of gases
G01L21/22—Vacuum gauges by measuring variation of frictional resistance of gases using resonance effects of a vibrating body; Vacuum gauges of the Klumb type
G—PHYSICS
G01—MEASURING; TESTING
G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
G01L9/0016—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a diaphragm
Abstract
1459825 Gauging vacuum PLASMON SpA 4 Nov 1974 [5 Nov 1973] 47579/74 Heading G1G The degree of vacuum in a container is checked by electromagnetically inducing vibrations of a wall of the container, receiving sound waves resulting from the vibration, analyzing them to determine whether or not the air-pressure in the container exceeds a given value, sensing the presence of the container at the checking point, and producing a container rejection signal if the given pressure is exceeded or if the sensed presence is not accompanied by a received sound wave signal. In the Fig. 2 embodiment the caps of jars on a conveyer are caused to resonate by electromagnet TD 1 energized with frequency-modulated pulses. The resulting sounds pass up conduit 11 to transducer H1 whose output is filtered to pass only those frequencies characteristic of jars having insufficient vacuum. The filtered signal is rectified and, if above a threshold amplitude, actuates a jar-reject mechanism after a delay equal to the travel time of a jar from the checking point to the reject point. The delay is provided by a shift register. The filtered and rectified output of a second transducer H2 responsive only to ambient noise is subtracted from the rectified signal from the transducer H1 so that ambient noise picked up by H1 does not cause spurious rejection of jars. The presence of a jar at the checking point is also sensed to ensure jar rejection if the cap lid is distorted and so cannot resonate. Cooling of electromagnet TD1 is aided by heat dissipators 12.
GB4757974A
1973-11-05
1974-11-04
Device and method for detecting the degree of vacuum in container for products such as food products
Expired
GB1459825A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
IT3091273A
IT1001624B
(en)
1973-11-05
1973-11-05
PROCEDURE AND DEVICE FOR DETECTION OF THE VACUUM DEGREE IN PRODUCT CONTAINERS SUCH AS FOOD PRODUCTS
Publications (1)
Publication Number
Publication Date
GB1459825A
true
GB1459825A
(en)
1976-12-31
Family
ID=11232762
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4757974A
Expired
GB1459825A
(en)
1973-11-05
1974-11-04
Device and method for detecting the degree of vacuum in container for products such as food products
Country Status (6)
Country
Link
JP
(1)
JPS5140181A
(en)
CH
(1)
CH600322A5
(en)
DE
(1)
DE2452059A1
(en)
FR
(1)
FR2250106B3
(en)
GB
(1)
GB1459825A
(en)
IT
(1)
IT1001624B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2192059A
(en)
*
1986-06-26
1987-12-31
Electricity Council
Method of and apparatus for determining characteristics of a fluid
CN103230880A
(en)
*
2013-03-28
2013-08-07
广州坚诺机械设备有限公司
Rapid nondestructive detection apparatus of vacuum degrees of containers, and detection method thereof
1973
1973-11-05
IT
IT3091273A
patent/IT1001624B/en
active
1974
1974-10-28
JP
JP12479774A
patent/JPS5140181A/en
active
Pending
1974-10-29
CH
CH1449274A
patent/CH600322A5/xx
not_active
IP Right Cessation
1974-11-02
DE
DE19742452059
patent/DE2452059A1/en
not_active
Withdrawn
1974-11-04
FR
FR7440348A
patent/FR2250106B3/fr
not_active
Expired
1974-11-04
GB
GB4757974A
patent/GB1459825A/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2192059A
(en)
*
1986-06-26
1987-12-31
Electricity Council
Method of and apparatus for determining characteristics of a fluid
GB2192059B
(en)
*
1986-06-26
1990-08-22
Electricity Council
Method of and apparatus for determining characteristics of a fluid
CN103230880A
(en)
*
2013-03-28
2013-08-07
广州坚诺机械设备有限公司
Rapid nondestructive detection apparatus of vacuum degrees of containers, and detection method thereof
CN103230880B
(en)
*
2013-03-28
2015-04-08
广州坚诺机械设备有限公司
Rapid nondestructive detection apparatus of vacuum degrees of containers, and detection method thereof
Also Published As
Publication number
Publication date
FR2250106B3
(en)
1977-09-02
JPS5140181A
(en)
1976-04-03
IT1001624B
(en)
1976-04-30
FR2250106A1
(en)
1975-05-30
DE2452059A1
(en)
1975-05-07
CH600322A5
(en)
1978-06-15
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Legal Events
Date
Code
Title
Description
1977-05-11
PS
Patent sealed
1994-11-30
PE20
Patent expired after termination of 20 years
Effective date:
19941103
