Patent US5280257A successfully refreshed from Google Patents.
US4307657A
Expired / Lapsed
US
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Popcorn popping and vending machine
Assignee: MARTIN INDUSTRIES
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Filing: 1980-06-24
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Granted: 1981-12-29
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Expires: 2000-06-24
Abstract
Abstract A manually actuated popcorn machine which heats, pops kernels of corn, and delivers a specified amount of popped corn to a waiting container in a short time. The popcorn machine includes a recirculating hot air conduit with an air blower portion, heating chamber portion, popping chamber portion for the kernels, a separating chamber portion, and a system of control baffles throughout the chambers for controlling the flow of air and popcorn. The conduits include a continuous main chamber and a spur conduit that leads to a cup dispensing chamber for placing the popped corn in a cup for distribution. When actuated, the popcorn machine delivers a set amount of stored kernels to a screened grid in the popping chamber, the air from the blower moves past the heating element and through the screened grid to work around the kernels and to keep the kernels in motion on and above the screen grid and to move the popped corn away from the screened grid and into a cup. When the hot air and the kernels reach a proper temperature, the kernels are popped and the volume and density are radically changed. The air, whose currents are controlled by baffles, delivers the more buoyant popped corn up and into the spur conduit for delivery to a container while the hot air is recycled into the blower.
Inventors
- 👤 Richard D. Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/0064; G07F17/0078; G07F17/0085; A; A23; A23L; A23L7/00; A23L7/10; A23L7/161; A23L7/174; A23L7/183; A23L7/187; A23L7/191
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
A new and improved self-cleaning popcorn popping and vending machine connectable to a power source which produces controlled velocity heated air from an air blower and heating element to cook a predetermined number of unpopped kernels of corn, as regulated by a product motor controlled kernel dispensing device, dispense the popped popcorn, dispense a topping from a topping dispenser on the popped popcorn while unpopped kernels are disposed of, whenever said machine is actuated, comprising: an outer casing, having at least a left wall; a continuous recirculating hot air conduit within said casing, said conduit having an air blower chamber, a heating chamber portion, a popping chamber portion, a separating chamber portion, and a plurality of control baffle means for controlling the velocity of said heated air and controlling the movement of the popcorn; a gridded support, said gridded support connected to said conduit within said popping chamber portion and having gridding of a size such that unpopped kernels of corn may not fall through; a control means for timing and regulating the functions of said machine.
Claim 2
Dependent Claim
177 words
A new and improved self-cleaning popcorn popping and vending machine connectable to a power source which produces controlled velocity heated air from an air blower and heating element to cook a predetermined number of unpopped kernels of corn, as regulated by a product motor controlled kernel dispensing device, dispense the popped popcorn, dispense a topping from a topping dispenser on the popped popcorn while unpopped kernels are disposed of, whenever said machine is actuated, comprising: an outer casing, having at least a left wall; a continuous recirculating hot air conduit within said casing, said conduit having an air blower chamber, a heating chamber portion, a popping chamber portion, a separating chamber portion, and a plurality of control baffle means for controlling the velocity of said heated air and controlling the movement of the popcorn; a gridded support, said gridded support connected to said conduit within said popping chamber portion and having gridding of a size such that unpopped kernels of corn may not fall through; a control means for timing and regulating the functions of said machine.
Claim 3
Dependent Claim
117 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 1, wherein: said plurality of control baffle means includes a first baffle, said first baffle connected to said conduit between said heating chamber portion and said popping chamber portion and controlling the velocity of said heated air; a second baffle, said baffle connected to said gridded support to control movement of the popcorn; a third baffle, said third baffle connected to said conduit within said popping chamber portion for controlling movement of the popcorn; a fourth baffle, said fourth baffle connected to said conduit, a predetermined distance from said third baffle, for preventing the unpopped kernels from being blown into said separating chamber portion.
Claim 4
Dependent Claim
59 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 2, wherein: said first baffle is rectangular-shaped; said second baffle is funnel-shaped and located downstream from said first baffle; said third baffle is an elongated member and located downstream from said second baffle; said fourth baffle is semi-circular shaped and located downstream from said third baffle.
Claim 5
Dependent Claim
230 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 3, wherein: said first baffle, said second baffle, said third baffle and said fourth baffle, create an average velocity of 1476 feet per minute at 72° F. of said heated air at a first point displaced 0.625 inches inwardly from the left wall of said machine and 0.25 inches above said gridded support; at a said point 2 inches inwardly from said first point and 0.25 inches above said gridded support an average velocity of 1638 feet per minute at 72° F. of heated air at a third point displaced 1 inch inwardly from said first point and 0.25 inches above said gridded support; an average velocity of 504 feet per minute at 72° F. of said heated air at a fourth point displaced 3.125 inches inwardly from the left wall of said machine and 0.25 inches above said gridded support; a computed average velocity of 1695 feet per minute at 72° F. of heated air at a fifth point displaced approximately 2 inches from said left wall of said machine and approximately 3.75 inches above said gridded support; a computed average velocity of 1638 feet per minute at 72° F. of heated air at a sixth point displaced inwardly 1 inch from said left wall of said machine and approximately 5.75 inches above said gridded support.
Claim 6
Dependent Claim
88 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 1, in which the control means comprises: a first electronic timing means for controlling said air blower and said heating element; said first electronic timing means electrically coupled to said air blower and said heating element; a second electronic timing means for controlling said product motor controlled kernel dispensing device; a third electronic timing means for controlling said topping dispenser and said gridded support, said third electronic timing means electrically coupled to said topping dispenser.
Claim 7
Dependent Claim
41 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 5, further comprising: a safety means for sensing the temperature of said heater element and disconnecting said power source from said machine whenever a preselected temperature is exceeded.
Claim 8
Dependent Claim
40 words
An improved self-cleaning popcorn popping and vending machine as set forth in claim 6, further comprising: a two-stage electronic control means for preheating said heating element at a first temperature and then changing said first temperature to a second temperature.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |