Patent US3937137A successfully refreshed from Google Patents.
US3937137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pancake making machine
Assignee: Sarl ETUD
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Filing: 1974-04-15
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Granted: 1976-02-10
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Expires: 1994-04-15
Abstract
Abstract A pancake-making machine (for baking French-type pancakes or "crepes") has a drum rotatable by a drive motor via heat-resistant synthetic-resin gears on its ends. A transfer roller carried on a batter trough is displaceable toward and away from the drum by a handle which controls the drive motor to arrest both the drum and the transfer roller when the two are pulled apart. The transfer roller forms a layer of batter on the drum which is heated by an internal electric heating element supplied with current through axially extending copper sleeves at its ends. The handle is a bent wire pivoted at each end in a slot in the machine housing and latchingly engageable against the displaceable trough. A thermistor imbedded in the drum adjacent the surface thereof is connected via an electronic circuit to a triac in series with the heating element to control the drum heating. A wire stretched tight between two support arms serves to strip the baked pancake from the drum.
Inventors
- 👤 Paul Marrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:47
CPC Classifications
A; A21; A21B; A21B5/00; A21B5/02; A21B5/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
243 words
In a pancake making machine comprising a trough adapted to receive a supply of batter, a drum rotatable adjacent said trough and formed with a continuous cylindrical peripheral surface except for an axially extending recess, a rotatable transfer roller with access to the batter in said trough closely juxtaposed with said drum, means for rotating said roller and said drum for transferring batter from said trough to said drum, means for heating said drum and baking the batter thereon, and scraper means downstream from said roller in the direction of drum rotation for removing the baked batter from said drum, the improvement comprising means including a vertically and pivotally displaceable handle for displacing said trough and said roller toward and away from said drum and latching means for holding said roller in a position immediately adjacent said drum, said latching means being vertically displaceable by vertical displacement of said handle from an upper position retaining said roller immediately adjacent said drum and a lower position wherein said roller may be retracted from said drum, said means for rotating including a drive motor and a switch controlling said drive motor, said switch being engaged by said means including said handle during vertical movement of said handle such that in the up position of said handle said switch is held closed to operate said drive motor and in the down position of said handle said switch is open to stop operation of said drive motor.
Claim 2
Dependent Claim
243 words
In a pancake making machine comprising a trough adapted to receive a supply of batter, a drum rotatable adjacent said trough and formed with a continuous cylindrical peripheral surface except for an axially extending recess, a rotatable transfer roller with access to the batter in said trough closely juxtaposed with said drum, means for rotating said roller and said drum for transferring batter from said trough to said drum, means for heating said drum and baking the batter thereon, and scraper means downstream from said roller in the direction of drum rotation for removing the baked batter from said drum, the improvement comprising means including a vertically and pivotally displaceable handle for displacing said trough and said roller toward and away from said drum and latching means for holding said roller in a position immediately adjacent said drum, said latching means being vertically displaceable by vertical displacement of said handle from an upper position retaining said roller immediately adjacent said drum and a lower position wherein said roller may be retracted from said drum, said means for rotating including a drive motor and a switch controlling said drive motor, said switch being engaged by said means including said handle during vertical movement of said handle such that in the up position of said handle said switch is held closed to operate said drive motor and in the down position of said handle said switch is open to stop operation of said drive motor.
Claim 3
Dependent Claim
20 words
The improvement defined in claim 1 wherein said means including said handle is a bent wire pivoted on the machine.
Claim 4
Dependent Claim
28 words
The improvement defined in claim 2 wherein said wire is provided with at least one abutment arm engageable against said trough in the upper position of said handle.
Claim 5
Dependent Claim
26 words
The improvement defined in claim 1 wherein said machine is formed with at least one vertical slot, said wire having an end pivoted in said slot.
Claim 6
Dependent Claim
20 words
The improvement defined in claim 1 wherein said latching means includes a spring having a tongue engageable with said trough.
Claim 7
Dependent Claim
123 words
The improvement defined in claim 1 wherein said apparatus further comprises a screen adapted to receive a pancake and means for supporting said screen above said drum, said scraper means including a pivotal support, a wire spanned across said support, spring means for tensioning said wire and for urging said wire against said surface, said drive gear comprising a metallic base plate fixed to said drum and a heat-resistant synthetic-resin gear wheel formed thereon and having teeth, said heating means including a thermistor imbedded in said drum immediately adjacent said surface, a heating element imbedded in said drum, and circuit means connected to said thermistor for feeding electricity to said heating means on the resistance of said thermistor dropping below a predetermined level.
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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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |