Systems and methods for dispensing, slicing, buttering, and toasting bread
One variation of a method for slicing a type of whole bread buns includes: retracting a cutting block along a chute into a load position; dispensing a whole bread bun into the chute between the cutting block and a blade extending across the chute; advancing the cutting block along the chute toward the blade; detecting contact between the cutting block and the blade at a contact position; at a first time, advancing the cutting block into a pierce position offset from the contact position toward the blade by a pierce distance less than a common width of the type of whole bread buns; and, at a second time succeeding the first time by a pierce duration, advancing the cutting block from the pierce position into a slice position adjacent the blade to drive the whole bread bun fully through the blade.
1. A system for dispensing bread buns into a bun slicing mechanism comprising:
a receiver;
a hopper comprising an elongated housing configured to contain a row of whole bread buns, wherein the elongated housing defines a discharge end configured to transiently engage the receiver and to dispense whole bread buns into the receiver, and wherein the elongated housing defines a pressurized end opposite the discharge end;
a piston arranged within the hopper between the pressurized end of the hopper and the row of whole bread buns;
a permeable seal interposed between an interior wall of the hopper and an adjacent surface of the piston, wherein the permeable seal cooperates with the hopper and the piston to define a closed volume between the pressurized end of the hopper and the piston, and wherein the permeable seal is configured to bleed gas from the closed volume toward the discharge end of the hopper;
a gas supply intermittently supplying gas into the closed volume to displace the piston toward the discharge end of the hopper; and
a roller arranged between the hopper and the receiver and extending into a boundary defined by a cross-section of the hopper projected toward the receiver parallel to an axis of the hopper.
2. The system of claim 1 , wherein:
the hopper defines a first planar surface and a second planar surface substantially normal to the first planar surface;
the first planar surface extending from the pressurized end to the discharge end and configured to support a vertical side of each whole bread bun in the row of whole bread buns;
the second planar surface extending from the pressurized end to the discharge end and configured to support a bottom side of each whole bread bun in the row of whole bread buns.
3. The system of claim 2 , wherein:
the roller defines a rotational axis parallel to the first planar surface and defining a first rolling surface offset from the first planar surface toward the axis of the hopper;
the system further comprises a second roller defining a second rotational axis parallel to the second planar surface and defining a second rolling surface offset from the second planar surface toward the axis of the hopper; and
the roller and the second roller cooperate to inhibit release of one of the whole bread buns in the row of whole bread buns, into the receiver.
4. The system of claim 1 , further comprising a distance sensor aligned with the axis of the hopper opposite the receiver, wherein:
the distance sensor is configured to output a signal proportional to a distance between the distance sensor and a surface of a nearest one of the whole bread buns in the row of whole bread buns arranged in the hopper; and
during a dispense cycle, the gas supply supplies gas to the closed volume at a flow rate proportional to the signal output by the distance sensor.
5. The system of claim 4 , wherein:
the gas supply comprises a pressurized gas reservoir and a valve arranged between the pressurized gas reservoir and the closed volume;
during the dispense cycle, the valve intermittently opens according to a duty cycle proportional to the signal output by the distance sensor; and
the valve closes in response to a step change in the signal output by the distance sensor to complete the dispense cycle.
6. The system of claim 1 , further comprising:
a pop-off valve fluidly coupled to the pressurized end of the hopper,
wherein the pop-off valve opens in response to a detection of release of one of the whole bread buns in the row of whole bread buns, into the receiver during a dispense cycle.
7. The system of claim 1 , wherein the piston comprises a tongue extending toward the discharge end of the hopper and over a crown of one of the whole bread buns adjacent the piston in the row of whole bread buns.
8. The system of claim 1 , wherein:
the piston defines a first end facing the pressurized end of the hopper and a second end facing the discharge end of the hopper;
the permeable seal comprises a first seal portion and a second seal portion; the first seal portion is arranged about a circumference of the piston adjacent the first end of the piston; the second seal portion is arranged about the circumference of the piston adjacent the second end of the piston; and the first seal portion and the second seal portion cooperate to bleed gas from the first end of the piston to the second end of the piston.
9. The system of claim 1 , further comprising a receptacle offset from the receiver, wherein the receptacle is:
fluidly coupled to the gas supply,
configured to transiently receive the pressurized end of the hopper,
configured to seal against the pressurized end of the hopper, and
configured to cooperate with the receiver to transiently support the hopper.
10. The system of claim 1 , further comprising:
a second receiver adjacent and offset above the receiver;
a second hopper configured to contain a second row of whole bread buns, the second hopper defining a second discharge end configured to transiently engage the second receiver and to dispense whole bread buns into the second receiver, the second hopper defining a second pressurized end opposite the second discharge end;
a second piston arranged within the second hopper between the second pressurized end of the second hopper and the second row of whole bread buns; and
a second permeable seal interposed between an interior wall of the second hopper and an adjacent surface of the second piston, wherein:
the second permeable seal cooperates with the second hopper and the second piston to define a second closed volume between the second pressurized end of the second hopper and the second piston,
the second permeable seal is configured to bleed gas from the second closed volume toward the second discharge end of the second hopper,
wherein the gas supply selectively supplies gas:
to the closed volume to advance the hopper toward the discharge end of the hopper; and
to the second closed volume to advance the second hopper toward the second discharge end of the second hopper.
11. The system of claim 1 , further comprising:
a chute defining a load end, defining a slice end vertically below the load end, and configured to receive the whole bread buns from the receiver between the load end and the slice end;
a blade extending across the chute proximal the slice end of the chute; and
a cutting block arranged in the chute and configured to advance from a load position to a pierce position to a slice position during a dispense cycle,
wherein:
the cutting block is adjacent the load end of the chute in the load position to receive one of the whole bread buns from the receiver,
the cutting block is arranged between the receiver and the blade in the pierce position offset from the blade by less than a length of the one of the whole bread buns for a pierce duration to pierce the one of the whole bread buns with the blade, and
the cutting block extends past the blade in the slice position to sever a crown of the one of the whole bread buns from a heel of the one of the whole bread buns.