US5479759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for packaging food
Assignee: Bakery Holdings LLC
•
Filing: 1994-12-21
•
Granted: 1996-01-02
•
Expires: 2014-12-21
Abstract
Abstract A method and apparatus for modified atmosphere packaging uses a rotary conveyor to transport a plurality of trays to be packaged between a plurality of stations in a circular arrangement. The trays may be loaded onto a receiving platform by depositing them over movable beds which can reciprocate downwardly in order to permit the trays to be removably held inside slots in a removable platform. Since the platform is removable from the conveyor, it may be centered in any particular station by lifting the platform from the conveyor and guiding it into a precise alignment at a particular station. The package may then be filled, its atmosphere replaced with one lower in oxygen content, and then the desired atmosphere sealed within the package. This can be done in the continuous fashion so that the film is severed from a continuous web. Advantageously, the cutting blades reciprocate with respect to a heat sealing apparatus inside an enclosed environment wherein the cutting blades have internal cooling means to prevent distortions caused by overheating. The various connections for gas and vacuum supply may be quickly disconnected, and an entire station may be changed through the use of quick disconnect connections of the apparatus of the station to a support. The unloading proceeds generally as the reverse or the loading process wherein the trays are pushed upwardly from the platforms and then slid outwardly onto a conveyor.
Inventors
- 👤 Michael P. Gorlich
- 👤 Robert F. McPherson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:43
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/18; B65D81/20; B65D81/2069; B65D81/2076; B65B; B65B25/00; B65B25/06; B65B25/065; B65B25/067; B65B31/00; B65B31/02; B65B31/025; B65B31/028; B65D77/00; B65D77/22; B65D77/30; B65D2251/00; B65D2251/0003; B65D2251/0006; B65D2251/0031; B65D2251/0068; B65D2251/0093; B65D2565/00; B65D2565/38; B65D2565/381; B65D2565/388
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
143 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station; and one of said stations including means for severing a film from a continuous web and means for heat sealing the film to a tray.
Claim 2
Independent Claim
143 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station; and one of said stations including means for severing a film from a continuous web and means for heat sealing the film to a tray.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1, wherein said platform is removably mounted on said conveyor.
Claim 4
Dependent Claim
42 words
The apparatus of claim 1, including a mechanism for enclosing a platform inside a substantially gas tight enclosure, said mechanism further including a device for removing the atmospheric gas, sealing the package with a film and severing the film from the package.
Claim 5
Dependent Claim
35 words
The apparatus of claim 3, wherein said enclosing mechanism includes a pair of open-ended chambers, at least one of which is movable toward the other so as to form at least one substantially airtight chamber.
Claim 6
Dependent Claim
31 words
The apparatus of claim 4, wherein a pair of opposed substantially airtight chambers are defined, at least one of said chambers adapted to seal against film used to cover said trays.
Claim 7
Dependent Claim
16 words
The apparatus of claim 1, including a mechanism for automatically aligning a platform with a station.
Claim 8
Dependent Claim
36 words
The apparatus of claim 6, wherein said mechanism includes a pair of pins mounted on the station, adapted to interact with apertures in said platform in a fashion which automatically indexes the platform to the station.
Claim 9
Dependent Claim
23 words
The apparatus of claim 7, wherein said pins include tapered upper portions which mate with tapered portions in said apertures in said platform.
Claim 10
Dependent Claim
14 words
The apparatus of claim 8, wherein said platforms are removably mounted on said conveyor.
Claim 11
Dependent Claim
18 words
The apparatus of claim 1, wherein gas and vacuum supply connections are provided which are quick disconnect connections.
Claim 12
Dependent Claim
28 words
The apparatus of claim 3, wherein gas supply valving is mounted directly to said mechanism to facilitate a fast gas supply reaction time and low usage of gas.
Claim 13
Dependent Claim
27 words
The apparatus of claim 3, wherein said vacuum supply valving is mounted directly to said mechanism to facilitate a fast vacuum supply reaction time to evacuate tooling.
Claim 14
Dependent Claim
18 words
The apparatus of claim 1, wherein said heating and sealing means telescopically reciprocate with respect to one another.
Claim 15
Dependent Claim
14 words
The apparatus of claim 13, wherein said severing means includes an internal cooling passage.
Claim 16
Dependent Claim
14 words
The apparatus of claim 1, wherein said stations are arranged around a tubular support.
Claim 17
Dependent Claim
32 words
The apparatus of claim 15, wherein said tubular support is capped on both ends to serve as a surge tank which provides a supply of gas for various operations at said stations.
Claim 18
Dependent Claim
43 words
The apparatus of claim 16, wherein said tubular support includes a drain for releasing a solution that is used to sanitize the inside of the surge tank to minimize bacteria transfer into the package during the gas exchange of atmosphere in the package.
Claim 19
Dependent Claim
21 words
The apparatus of claim 15, including a drive system for the rotary conveyor, said drive system mounted on said tubular support.
Claim 20
Dependent Claim
20 words
The apparatus of claim 1, wherein the center of the machine is the support structure that supports the rotary conveyor.
Claim 21
Dependent Claim
27 words
The apparatus of claim 1, wherein said rotary conveyor is arranged around a surge tank which provides a supply of gas for various operations at said stations.
Claim 22
Dependent Claim
16 words
The apparatus of claim 1, including a support, said stations being removably connected to said support.
Claim 23
Independent Claim
137 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; aligning said platform to said station; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; aligning said trays precisely with said station after said trays arrive at said station; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; sealing the film to the tray; severing the film; and lifting said platform from said conveyor after said platform arrives at a station.
Claim 24
Independent Claim
137 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; aligning said platform to said station; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; aligning said trays precisely with said station after said trays arrive at said station; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; sealing the film to the tray; severing the film; and lifting said platform from said conveyor after said platform arrives at a station.
Claim 25
Dependent Claim
23 words
The method of claim 22, including the step of aligning said trays precisely with said station after said trays arrive at the station.
Claim 26
Dependent Claim
34 words
The method of claim 23, wherein said aligning step includes the steps of engaging apertures in said platform to remove said platform from said conveyor and guiding said platform into alignment with said station.
Claim 27
Dependent Claim
45 words
The method of claim 22, including the steps of severing the film from a roll of film material and then heat sealing said film to said trays, said method further including the step of providing internal cooling fluid to the mechanism for severing the film.
Claim 28
Dependent Claim
60 words
The method of claim 22, including the step of enclosing said trays in a gas tight environment at one station or, said rotary conveyor, removing the gaseous environment from within the enclosure and providing a desired gaseous environment within this enclosure, and sealing the trays closed with a film so as to maintain the desired gaseous environment within the package.
Claim 29
Dependent Claim
39 words
The method of claim 22, wherein said trays are loaded onto a rotary conveyor by the steps of pushing said trays onto supports in said conveyor, and then lowering said supports such that said trays engage said conveyor platforms.
Claim 30
Dependent Claim
55 words
The method of claim 22, including the steps of placing a film over said trays, defining at least one substantially gas-tight chamber, drawing a vacuum over said film to lift said film away from said trays, withdrawing the atmosphere from within said trays, and thereafter providing the desired atmosphere to the interior of said trays.
Claim 31
Dependent Claim
55 words
The method of claim 28, including the step of sealing a film to said trays within said substantially gas-tight chamber, said sealing step including the step of reciprocating a sealing bar towards and away from said film, and removing said sealing bar from said chamber by unthreading a fastener on the exterior of said chamber.
Claim 32
Independent Claim
152 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and one of said stations including a film supplying device, a film severing device and a device for sealing a film to said trays, said severing and sealing devices being reciprocatable relative to one another, the severing device including an internal passage for cooling fluids to prevent the heat of the sealing device from interfering with the severing operation.
Claim 33
Independent Claim
152 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and one of said stations including a film supplying device, a film severing device and a device for sealing a film to said trays, said severing and sealing devices being reciprocatable relative to one another, the severing device including an internal passage for cooling fluids to prevent the heat of the sealing device from interfering with the severing operation.
Claim 34
Independent Claim
132 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for covering said trays with film; and an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content after covering said trays with a film, said apparatus adapted to lift said film to be sealed to the trays from said trays to provide head space for gas exchange.
Claim 35
Independent Claim
132 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for covering said trays with film; and an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content after covering said trays with a film, said apparatus adapted to lift said film to be sealed to the trays from said trays to provide head space for gas exchange.
Claim 36
Dependent Claim
16 words
The apparatus of claim 31 wherein said apparatus includes a vacuum mechanism for lifting said film.
Claim 37
Independent Claim
132 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray by severing the film from a roll of film material and then heat sealing said film to said tray, and providing internal cooling to the mechanism for severing the film; and unloading said trays from the rotary conveyor.
Claim 38
Independent Claim
132 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray by severing the film from a roll of film material and then heat sealing said film to said tray, and providing internal cooling to the mechanism for severing the film; and unloading said trays from the rotary conveyor.
Claim 39
Independent Claim
138 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; aligning said trays precisely with said station after said trays arrive at the station by engaging apertures in said platform to remove said platform from said conveyor and guiding said platform into alignment with said station; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; and unloading said trays from the rotary conveyor.
Claim 40
Independent Claim
138 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; aligning said trays precisely with said station after said trays arrive at the station by engaging apertures in said platform to remove said platform from said conveyor and guiding said platform into alignment with said station; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; and unloading said trays from the rotary conveyor.
Claim 41
Independent Claim
124 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor by pushing said trays onto supports in said conveyor and then lowering said supports such that said trays engage said conveyor supports; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; and unloading said trays from the rotary conveyor.
Claim 42
Independent Claim
124 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor by pushing said trays onto supports in said conveyor and then lowering said supports such that said trays engage said conveyor supports; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray; and unloading said trays from the rotary conveyor.
Claim 43
Independent Claim
141 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray by placing a film over said tray, defining at least one substantially gas-tight chamber, drawing a vacuum over said film to lift said film away from said tray and providing the desired atmosphere to the interior of said tray; and unloading said trays from the rotary conveyor.
Claim 44
Independent Claim
141 words
A method for making modified atmosphere packaging comprising the steps of: loading a plurality of trays on a platform resting on a support on a rotary conveyor; indexing said trays between a plurality of stations arranged in a circular path; displacing said platform upwardly from said support to a raised position; aligning said platform in its raised position with said conveyor; withdrawing the atmosphere from within a tray after a food product has been added; covering said tray with a film so as to maintain an atmosphere reduced in oxygen content within the tray by placing a film over said tray, defining at least one substantially gas-tight chamber, drawing a vacuum over said film to lift said film away from said tray and providing the desired atmosphere to the interior of said tray; and unloading said trays from the rotary conveyor.
Claim 45
Dependent Claim
55 words
The method of claim 36, including the step of sealing a film to said trays within said substantially gas-tight chamber, said sealing step including the step of reciprocating a sealing bar towards and away from said film, and removing said sealing bar from said chamber by unthreading a fastener on the exterior of said chamber.
Claim 46
Independent Claim
207 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content, said apparatus including an enclosing mechanism for enclosing a platform inside a substantially gas-tight enclosure, said mechanism further including a device for removing the atmospheric gas, sealing the package with a film, and severing the film from the package, said enclosing mechanism including a pair of opposed, substantially air-tight, open-ended chambers, at least one of which is movable toward the other so as to form at least one substantially airtight chamber, at least one of said chambers adapted to seal against the film used to cover said trays; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 47
Independent Claim
207 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content, said apparatus including an enclosing mechanism for enclosing a platform inside a substantially gas-tight enclosure, said mechanism further including a device for removing the atmospheric gas, sealing the package with a film, and severing the film from the package, said enclosing mechanism including a pair of opposed, substantially air-tight, open-ended chambers, at least one of which is movable toward the other so as to form at least one substantially airtight chamber, at least one of said chambers adapted to seal against the film used to cover said trays; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 48
Independent Claim
160 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; a mechanism for automatically aligning a platform with a station, said mechanism including a pair of pins mounted on the station, and adapted to interact with apertures in said platform in a fashion which automatically indexes the platform to the station; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 49
Independent Claim
160 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; a mechanism for automatically aligning a platform with a station, said mechanism including a pair of pins mounted on the station, and adapted to interact with apertures in said platform in a fashion which automatically indexes the platform to the station; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 50
Dependent Claim
23 words
The apparatus of claim 39, wherein said pins include tapered upper portions which mate with tapered portions in said apertures in said platform.
Claim 51
Dependent Claim
14 words
The apparatus of claim 40, wherein said platforms are removably mounted on said conveyor.
Claim 52
Independent Claim
139 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a surge tank for providing a supply of gas for various operations at said stations; a rotary conveyor, arranged around said surge tank, for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 53
Independent Claim
139 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a surge tank for providing a supply of gas for various operations at said stations; a rotary conveyor, arranged around said surge tank, for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 54
Dependent Claim
43 words
The apparatus of claim 42, wherein said tubular support includes a drain for releasing a solution that is used to sanitize the inside of the surge tank to minimize bacteria transfer into the package during the gas exchange of atmosphere in the package.
Claim 55
Independent Claim
158 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a tubular support having ends, said stations begin arranged around said tubular support, said tubular support being capped on both ends to serve as a surge tank which provides a supply of gas for various operations at said stations; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
Claim 56
Independent Claim
158 words
An apparatus for making modified atmosphere packages comprising: a plurality of packaging stations, including at least one station for loading a food product into trays; a tubular support having ends, said stations begin arranged around said tubular support, said tubular support being capped on both ends to serve as a surge tank which provides a supply of gas for various operations at said stations; a rotary conveyor for moving said trays from one station to the next, said rotary conveyor including a platform for carrying a plurality of trays; one of said packaging stations adapted to load said trays on said platform, and another of said stations adapted to unload said trays from said platform; an apparatus for replacing the ambient atmosphere in said trays with an atmosphere reduced in oxygen content; and a mechanism for displacing said platform from a first position on one of said stations upwardly to a second position still aligned with said station.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |