Patent Grant
9801390
This application claims priority to Japanese Patent Application No. 2013-208900, filed Oct. 4, 2013, hereby incorporated by reference in its entirety as if fully set forth herein.
Technical Field
The present invention relates to a device for circularizing croissant dough, a device for forming croissant dough in a U-shape, a system for producing croissants, a method for circularizing croissant dough, and a method for forming croissant dough in a U-shape, each of which is suitable for production on a large scale.
Background Art
Croissants have been popularly known for their unique shape of a crescent or a circle in that the tips of the crescents are connected. Conventionally, a machine for forming croissants in such a shape has been developed. However, though the croissant dough is formed in that shape, it swells at a later process (a rising or baking process) to return to its original shape, such as a crescent or a bar. Thus a method for putting one tip of the crescent on the other tip and for bonding them by pressure has been known, to thereby maintain the shape of the croissant dough.
For example, by a method disclosed by European Patent Application Publication No. 0490190 (Publication 1), croissant dough is circularized by a pair of bending arms. One of the bending arms is equipped with a tab for lifting. When the pair of bending arms are swung about their respective base ends, the croissant dough that is formed like a bar by being rolled up is formed to follow the shape of the bending arms. The bending arm that is equipped with the lifting tab moves upward when it swings. Thus one end of the croissant dough is lifted by the lifting tab. Therefore, when the pair of bending arms swing so that their front ends close, the tips of the croissant dough that is circularized to follow the shape of the bending arms overlap. Subsequently, the portions that overlap are pressed by a plunger to be stuck together.
By a method disclosed by International Publication No. WO 2011/144191 (Publication 2), croissant dough is circularized by a pair of retaining jaws and a pair of shaping jaws. Both ends of bar-shaped croissant dough that has been rolled up are clamped by the retaining jaws and the shaping jaws. The pair of retaining jaws and the pair of shaping jaws are moved by a pair of pivot carriers so as to circularize the bar-shaped croissant dough. One of the pivot carriers moves upward when it swings. Thus one end of the croissant dough is lifted so that the ends overlap. Subsequently, the portions that overlap are pressed by a plunger to be stuck together.
Further, it is preferable to form symmetrical croissants. However, neither Publication 1 nor 2 discusses croissants being symmetrically formed. Japanese Patent No. 2747778 (Publication 3) discloses a method for symmetrically forming croissant dough. By that method bar-shaped croissant dough that has been rolled up passes through a space between a pair of hourglass rollers to be moved to the center in a conveyor that conveys the dough. The croissant dough is pushed at the center of its back side that is located at the center of the conveyor by a member that moves along the center of the conveyor in the direction for conveyance. It is squeezed into a space between a pair of belts that inwardly incline in the downstream direction. The pair of belts form the croissant dough in a symmetrical shape.
However, by the method of Publication 1, since the pair of bending arms swing about the base ends, the croissant dough cannot pass through the space between the bending arms. Thus the bar-shaped croissant dough is dropped into that space from the rollers that are located above the bending arms. Since by such a method the position of the bar-shaped croissant dough is not constant, it is difficult to form it in the required shape. Thus the method is impractical.
By the method of Publication 2, setting the forces to clamp the croissant dough by the retaining jaws and the shaping jaws is difficult. The portion of the croissant dough that is clamped is often crushed. Further, since the croissant dough is clamped to be lifted, the operating speed is limited and the capacity for production is restricted. Further, the device for carrying out the method is complicated and large. These are problems.
By the method of Publication 3, since the croissant dough that has been rolled up has a thick center that is difficult to bend, it is not always formed symmetrically, depending on its Elasticity (the hardness of the inside of the dough). (The term “Elasticity” means elasticity or hardness when it is inwardly pressed.) This is a problem.
The present invention aims to provide a device and a method for quickly and stably circularizing croissant dough.
The present invention also aims to provide a device and a method for forming bar-shaped croissant dough in a U-shape, then quickly and precisely arranging both legs of the U-shape to have the same length, and producing croissants in the required shape.
To solve these problems, a device for circularizing croissant dough of the present invention is, for example as shown in
The device for circularizing the croissant dough 100 may, for example as shown in
In the device for circularizing the croissant dough 100, for example as shown in
The device for circularizing the croissant dough 100 may, for example as shown in
In the device for circularizing the croissant dough 100, the timing to vertically press the first end 5a and the second end 5b together by the pusher 130 or the distance to lower the pusher 130 to press the first end 5a and the second end 5b together, or both, may be adjustable.
In the device for circularizing the croissant dough 100, for example as shown in
The device for circularizing the croissant dough 100 may, for example as shown in
In the device for circularizing the croissant dough 100, for example as shown in
To solve the problems, a device for forming the croissant dough in a U-shape as in the present invention is, for example as shown in
The device for forming the croissant dough in a U-shape 10 may, for example as shown in
In the device for forming the croissant dough in a U-shape 10, the contacting condition between the pair of side belts 40 and the croissant dough 5 is less slippery than the contacting condition between the conveyor 20 and the croissant dough 5 for conveying the croissant dough 5.
To solve the problems, a system for producing croissants of the present invention comprises, for example as shown in
To solve the problems, a method for circularizing croissant dough is, as shown in
The method for circularizing the croissant dough may, as shown in
In the method for circularizing the croissant dough, for example as shown in
The method for circularizing the croissant dough may, for example as shown in
The method for circularizing the croissant dough may comprise a step of attaching water to a part of the first end 5a or a part of the second end 5b, wherein one of the parts contacts a face of the other end so that the first end 5a sticks to the second end 5b.
In the method for circularizing the croissant dough, the length L4 of the legs of the first and second ends 7a, 7b to be stuck together at the step of sticking may be regulated.
The length L4 of the first and second ends 5a, 5b to be stuck together may be regulated by adjusting a position so that the first end 5a is pressed so that it is moved to the center of the U-shape and a position so that the second end 5b is pressed so that it is also moved to the center of the U-shape.
In the method for circularizing the croissant dough, at the step of sticking the first end 5a and the second end 5b together the time for vertically pressing the first end 5a to the second end 5b may be adjusted or the travel to vertically press the first end 5a and the second end 5b so that the first end 5a and the second end 5b are stuck together may be adjusted, or both may be adjusted.
To solve these problems, a method for forming croissant dough in a U-shape, which croissant dough is used in the method for circularizing the croissant dough of the present invention, for example as shown in
By the device for circularizing the croissant dough of the present invention, since the device comprises the first guide for reducing the width, the plate, the second guide for reducing the width, and the pusher so as to vertically press and stick together the first end to the second end, the croissant dough can be quickly and stably circularized.
By the device for forming the croissant dough in a U-shape of the present invention, since the device comprises the conveyor, the pair of side belts, the center pin, and the sensor so as to adjust the rates for transporting the croissant dough by each of the side belts so as to arrange the lengths of the legs of the U-shape to have the same length, croissants in the required shape can be produced by quickly and stably arranging the lengths of the legs of the U-shape to have the same length.
By the method for circularizing the croissant dough of the present invention, the method comprises the steps of carrying the croissant dough in a position for circularizing the croissant dough, moving the first end of the conveyed croissant dough to the center, lifting and moving the second end to the center, and vertically pressing and sticking together the first end to the second end that are moved to the center, the croissant dough can be quickly and stably circularized.
By the method for forming the croissant dough in a U-shape of the present invention, since the method comprises the steps of conveying the rolled-up croissant dough that is placed so that the longitudinal direction of the croissant dough is perpendicular to the direction for conveyance, pushing the center of the length of croissant dough in the direction for conveyance, contacting the pushed croissant dough 3 from both longitudinal ends to form the croissant dough in a U-shape and to transport both legs of the U-shape to the direction for conveyance, and measuring the lengths of the legs of the U-shape or the distance between the ends of the legs of the croissant dough so that the rates for transporting both legs in the direction for conveyance are adjusted during the step of transporting both legs of the U-shape so as to arrange the lengths of the legs to have the same length. Thereby, the lengths of the legs of the U-shaped croissant dough can be quickly and stably arranged to have the same length so that croissants in a required shape are produced.
The basic Japanese patent application, No. 2013-208900, filed Oct. 4, 2013, is hereby incorporated by reference in its entirety in the present application.
The present invention will become more fully understood from the detailed description given below. However, the detailed description and the specific embodiments are only illustrations of the desired embodiments of the present invention, and so are given only for an explanation. Various possible changes and modifications will be apparent to those of ordinary skill in the art on the basis of the detailed description.
The applicant has no intention to dedicate to the public any disclosed embodiment. Among the disclosed changes and modifications, those which may not literally fall within the scope of the present claims constitute, therefore, a part of the present invention in the sense of the doctrine of equivalents.
The use of the articles “a,” “an,” and “the” and similar referents in the specification and claims are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by the context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein is intended merely to better illuminate the invention, and so does not limit the scope of the invention, unless otherwise stated.
Below, with reference to the drawings an embodiment of the present invention is discussed. In the figures, identical or similar elements are designated with the same symbols, and duplicate explanations are omitted.
First, the device for forming the croissant dough in a U-shape 10 is discussed with reference to
Croissant dough 3 that has been manufactured by a device for producing croissant dough (not shown) and rolled up by a device for rolling dough (not shown) is shaped as a bar that has a thick center. It is placed on a conveyor 22 so that its longitudinal axis is perpendicular to the direction for conveyance, i.e., its longitudinal axis is vertical in
A water feeder 70, which attaches water to a part of the ends, which ends are to be stuck together to circularize the croissant dough, is provided to the conveyor 24. The water feeder 70 comprises a nozzle 72 that extends downward and a cylindrical sponge 74 at the lower side of the tip of the nozzle 72, which sponge is rotatably supported by a horizontal shaft. The configuration of the water feeder 70 is not limited to that discussed above. It may be a publicly-known one that can attach water to the end of the croissant dough 3. For example, a brush may be used instead of the sponge. It may drop water from a nozzle, without a sponge, to directly attach it to the croissant dough. Here, the water is not limited to natural water, but may be paste for food such as starch paste or a liquid that is suitable to stick the parts of the croissant dough together. A position to provide the water feeder 70 may be in the downstream side of a device for grooving to facilitate bending the croissant dough 50 (a device for grooving 50), which is discussed below. The water feeder 70 may be positioned at any place where it can attach water to the end of the croissant dough before the croissant dough is circularized.
In the upstream portion of the conveyor 26 the device for grooving 50 is provided. It facilitates bending the croissant dough by making grooves 6 in the thick portion of the croissant dough 3 that is rolled up so as to be shaped like a bar that has a thick center. The device for grooving 50 comprises two blades 52, a shaft 54 and a motor for grooving to facilitate bending the croissant dough 56 (a motor for grooving 56). The blades 52 make the grooves 6 from above in the thick portion of the croissant dough 3 that has been rolled up and is conveyed on the conveyor 26. The shaft 54 supports, and rotates, the blades 52. The motor for grooving 56 rotates the shaft 54. The number of grooves made in the croissant dough 3, i.e., the number of blades 52, may be arbitrarily determined based on the size, thickness or Elasticity of the croissant dough 3. Depending on the croissant dough 3, no device for grooving 50 may be provided.
The device for grooving 50 comprises a belt for pressing the croissant dough down and rolling the croissant dough 60 that presses the croissant dough 3 down if the croissant dough 3 is lifted by the blades 52 when it adheres to the blades 52 while being grooved by the blades 52. The belt 60 also rolls the croissant dough 3, in which the grooves 6 are made so that the grooves face upward to facilitate bending the croissant dough 3 to be in a U-shape. The belt 60 is an endless belt made of a flexible material such as rubber. A plurality of belts 60 are rotated between a plurality of rollers 62. At the lower portion, i.e., the side to contact the croissant dough 3, the belt 60 moves in the downstream direction more slowly than the conveyor 26 does or in the direction opposite to the direction that the conveyor 26 moves. When the croissant dough 3 is grooved by the blades 52 the belt 60 presses the croissant dough 3 down so as to separate it from the blades 52 if the croissant dough 3 is lifted by the blades 52 when it adheres to the blades 52 while being grooved by the blades 52. The lower portion of the belt 60 is lowered by a middle roller 63. When the croissant dough 3 moves to the downstream side of the blades 52 the belt 60 contacts the croissant dough 3. Because of the difference in the speeds for transporting the croissant dough 3 by the belt 60 and the conveyor 26, the croissant dough 3 is rolled. The rotation of the belt 60 as an endless belt is carried out by rotating one roller 62 or multiple rollers 62 by a driver for the belt 64. By the embodiment in
A sensor for detecting the croissant dough 38 is provided above the conveyor 26 in the downstream side of the device for grooving 50. The sensor 38 detects the croissant dough 3 that is conveyed on the conveyor 26 so as to determine the timing of the operation of a device for a center pin 30 that is provided in the downstream side of the sensor 38. The sensor 38 is a sensor of any type that can detect the croissant dough 3. It may be of contact type or non-contact type. For example, a microswitch or an optoelectronic sensor may be used for it. The position where the sensor 38 is located is not necessarily above the conveyor 26. It may be at the side of the conveyor 26 or at another conveyor.
The device for a center pin 30 and side belts 40 are provided in the downstream side of the sensor 38 on the conveyor 26. The device for a center pin 30 pushes, by a center pin 32, the center of the croissant dough 3 that is shaped as a bar and conveyed on the conveyor 26 so as to feed the croissant dough 3 to the side belts 40. The device 30 comprises a belt for the center pin 34, which belt rotates between at least two rollers. It also comprises one or multiple center pins 32 that are fixed to the belt 34. The center pin 32 is located at the center of the width of the conveyor 26 so as to push the center of the length of the croissant dough 3 that is conveyed. When the rollers rotate, the center pin 32 moves in the downstream direction above the conveyor 26 at the same speed, or a slightly faster speed, than that of the conveyor 26, and returns to the upstream position. In the embodiment of
The side belts 40 are located in the downstream side of the device 30. The side belts 40 are a pair of belts 40a, 40b that horizontally face one another. Each of the side belts 40a, 40b is supported by two pulleys so that the faces that face one another are parallel or so that the space between them becomes narrower in the downstream side. Each of the side belts 40a, 40b rotates between the two pulleys by the rotation of the pulley that is driven by one of the motors for the side belts 44a, 44b (44). The pair of side belts 40 enfold the croissant dough 3, from two sides. It is pushed and fed by the center pin 32 so as to form the croissant dough 3 in a U-shape that opens in the upstream direction. They also transport it in the downstream direction. The upstream ends of the pair of side belts 40 are located at, or near, the ends of the croissant dough 3 that is pushed and fed by the center pin 32. That is, the croissant dough 3 that is pushed and fed by the center pin 32 contacts the pair of side belts 40 at their ends. It is bent so that the place that is pushed by the center pin 32 is the center. Thus it is formed in a U-shape. Then the pair of side belts 40 contact the legs (the vertical lines of the U) of croissant dough 5 that is formed in a U-shape to transport the croissant dough 5 in the direction for conveyance. The space between the pair of side belts 40a and 40b that face one another can be adjusted.
Above each of the side belts 40 sensors 48 are provided to measure the lengths of the legs of the U-shaped croissant dough 5. The sensors 48 for measuring the lengths of the legs may be a contact type or a non-contact type. For example, a microswitch or an optoelectronic sensor may be used for them. Instead of the sensors 48 for measuring the lengths of the legs sensors may measure the distance between the positions of the tips of the legs. The distance between the positions of the tips of the legs is the distance between the positions of the tips of the legs in the direction for conveyance at any instant of time. It may be measured as the difference between the times when the tips of the croissant dough 5 that is being conveyed pass a line that is perpendicular to the direction for conveyance. The positions where the sensors 48 are provided are not necessarily above the side belts 40. They may be at the sides of the side belts 40 or other positions.
Based on the data measured by the sensors 48 for detecting the lengths of the legs or alternate sensors, a controller (not shown) of the device for forming the croissant dough in a U-shape 10, for example, calculates how to move the legs to arrange the lengths L1, L2 (see
Next, the device for circularizing the croissant dough 100 is discussed. A conveyor 122 is provided at the downstream side, adjacent to the conveyor 26. A conveyor 124 is provided at the downstream side, adjacent to the conveyor 122. These conveyors 122, 124 are collectively called a conveyor 120. The conveyor 120 is not necessarily composed of two conveyors 122, 124. The number of conveyors is arbitrarily determined based on the distance to convey the croissant dough and so on. Thus, in the following discussion, the references to the conveyor 122 or 124 are nothing more than a discussion on an embodiment, and do not limit the scope of the invention.
A second sensor for detecting the croissant dough 138 is provided above the upstream portion of the conveyor 122. The second sensor 138 detects the croissant dough 5 that is conveyed on the conveyor 122 so as to stop the croissant dough 5 at the working positions for a first guide for reducing the width 114, a second guide for reducing the width 116, a plate 118, a pusher 130, and so on, that are located in the downstream side of the second sensor 138. The second sensor 138 is also used for determining the timing for actuating these members. The second sensor 138 is a sensor of any type that can detect the croissant dough 5. It may be a contact type or a non-contact type. For example, a microswitch or an optoelectronic sensor may be used for it. The position where the second sensor 138 is located is not necessarily above the conveyor 122. It may be at the side of the conveyor 122 or another conveyor.
Holders (first holders) 110, 112, the first guide for reducing the width 114, the second guide for reducing the width 116, the plate 118, and the pusher (a first pusher) 130, are provided on the conveyor 122 in the downstream side of the second sensor 138. These members are collectively called a principal part of the device for circularizing the croissant dough 102. The principal part 102 circularizes the U-shaped croissant dough 5.
Based on the signal for detection by the second sensor 138 the croissant dough 5 that is conveyed by the conveyor 122 is controlled to stop at the working positions for the principal part 102. The working positions for the principal part 102 mean the positions where the principal part 102 circularizes the croissant dough 5, which principal part is discussed below. The positions to stop the croissant dough 5 can be precisely adjusted within the working positions for the principal part 102. That is, after the second sensor 138 detects the croissant dough 5, the distance to convey the croissant dough 5 before the conveyor 122 stops (namely, if the conveyor conveys at a constant rate, the time from detecting the croissant dough to stopping the conveyor) can be adjusted.
Now, further with reference to
The first guide for reducing the width 114 moves the end 5a of one leg of the U-shaped croissant dough 5 to the center of the U-shape, the first guide linearly moving toward, and retracting from, the center (see
The second guide for reducing the width 116 is located to face the first guide 114. It moves the other end 5b of the U-shaped croissant dough 5 to the center of the U-shape, the second guide linearly moving toward, and retracting from, the center (see
The plate 118 is inserted between the second guide 116 and the conveyor 122 to lift the second end 5b. The plate 118 is connected to the driver 104 and is horizontally reciprocated with the holder 112. Further, it is vertically moved by a driver 107. It is typically made of a metal plate. It is made of a material that has stiffness so as not to bend when the plate 118 lifts the second end 5b and that does not adhere to the croissant dough 5. When the U-shaped croissant dough 5 is carried to the principal part 102, i.e., the position to circularize the croissant dough, the plate 118 is moved by the driver 104 toward the center of the conveyor 122 to slip under the second end 5b. After moving to the center to have the second end 5b be mounted on it, the plate 118 is moved upward by the driver 107 to lift the second end 5b. It moves to the height so that the lower face of the second end 5b is higher than the upper face of the first end 5a. After the second end 5b is moved to the center of the U-shape by the second guide 116, the plate 118 returns to the original height, i.e., just on the conveyor 122. Thereafter the plate 118 retracts from the center.
The pusher 130 is vertically moved by a driver 108 so as to press the first end 5a and the second end 5b, which are moved to the center so that they stick together (see
For the pusher 130 the time for pressing the first end 5a and the second end 5b and the travel to move downward to press them (i.e., the height s from the face for conveyance of the conveyor 122 when the pusher 130 is lowered [see
Further, since the positions to stop the croissant dough 5 within the working positions for the principal part 102 can be precisely adjusted, the position for the first guide 114 to press the first end 5a to move it to the center of the U-shape and the position for the second guide 116 to press the second end 5b to move it to the center of the U-shape are regulated. Thus the length L4 of an overlapped portion of the first end 5a and the second end 5b is regulated. The position for the pusher 130 to press them is also regulated. Since the length L4 of the overlapped portion of the first end 5a and the second end 5b and the position for the pusher 130 to press them are regulated and the degree (strength) to cause them to be stuck together is also regulated, the shape of the croissants after baking can be regulated, to thereby produce the croissants in a desired shape.
Next, a second pusher 144 that is provided on the conveyor 124 and structures that relate to the second pusher 144 are discussed. A third sensor for detecting the croissant dough 148 is provided above the upstream portion of the conveyor 124. The third sensor 148 detects the croissant dough 7 that is conveyed on the conveyor 124 so as to stop the croissant dough 7 at the working positions for second holders 140, 142, a second pusher 144, and so on, that are located in the downstream side of the third sensor 148. The third sensor 148 is also used for determining the timing for actuating these members. The third sensor 148 is a sensor of any type that can detect the croissant dough 7. It may be a contact type or a non-contact type. For example, a microswitch or an optoelectronic sensor may be used for it. The position where the third sensor 148 is located is not necessarily above the conveyor 124. It may be at the side of the conveyor 124 or at another conveyor.
The second holders 140, 142 and the second pusher 144 are provided on the conveyor 124 in the downstream side of the third sensor 148. The second holders 140, 142 enfold from the sides the circularized croissant dough 7 that is conveyed on the conveyor 124 (see
Based on the signal for detection generated by the third sensor 148 the croissant dough 7 that is conveyed by the conveyor 124 is controlled to stop at the working positions for the second holders 140, 142 and the second pusher 144. The working positions for the second holders 140, 142 and the second pusher 144 mean the positions where the croissant dough 7 is processed by the second holders 140, 142 and the second pusher 144. The positions to stop the croissant dough 7 can be precisely adjusted within the working positions for the second holders 140, 142 and the second pusher 144. That is, after the third sensor 148 detects the croissant dough 7, the distance to convey the croissant dough 7 before the conveyor 124 stops (if the conveyor conveys at a constant rate, the time from detecting the croissant dough to stopping the conveyor) can be adjusted.
The second pusher 144 is vertically moved by a driver 145 so as to again vertically press the first and second ends 7a, 7b that are stuck together (see
For the second pusher 144 the time for pressing the first end 7a and the second end 7b and the travel to move downward to press them (i.e., the height s2 from the face for conveyance of the conveyor 124 when the second pusher 144 is lowered [see
Further, since the positions to stop the croissant dough 7 within the working positions for the second holders 140, 142 and the second pusher 144 can be precisely adjusted, the position for the second pusher 144 to press the first end 7a and the second end 7b is regulated. Since the position for the second pusher 144 to press them is regulated and the degree (strength) to cause them to be stuck together is also regulated, the length L5 of the ends that are stuck together can be regulated. Thus since the second pusher 144 presses the first end 7a and the second end 7b, the croissant dough as a whole becomes round. Further, the shape of the croissants after baking can be regulated, to thereby produce the croissants in a desired shape.
For example, the drivers 104, 105, 106, 107, 108, 141, 143, 145 of the device for circularizing the croissant dough 100 may be direct-acting-type air cylinders. However, any other known driver may be used. The positions for driving and the strokes of these drivers can be regulated so as to follow the change of the size of the croissant dough to be shaped.
Next, a system for producing croissants 1 that includes the device for forming the croissant dough in a U-shape 10 and the device for circularizing the croissant dough 100 is discussed. In the upstream side of the device for forming the croissant dough in a U-shape 10, the system for producing croissants 1 has a device for producing croissant dough, a device for flattening the croissant dough, a cutter for cutting the flattened croissant dough, and a device for rolling up the croissant dough. The device for producing croissant dough interfolds fat with dough that is produced by kneading raw materials to form “roll-in dough,” which is a laminate of dough and fat, and folds the roll-in dough to produce the croissant dough. The device for flattening the croissant dough flattens the croissant dough into a thin sheet. The cutter for cutting the flattened croissant dough cuts the flattened croissant dough into triangular sheets. The device for rolling up the croissant dough rolls up the triangular croissant dough so that the center is thick, but becomes less thick toward the ends. The system for producing croissants 1 may include conveyors to convey the croissant dough between these devices.
The system for producing croissants 1 may include a part for turning over the croissant dough in the downstream side of the device for circularizing the croissant dough 100. The part for turning over the croissant dough turns over the circularized croissant dough 7 so that the upstream portion comes downstream and vice versa. In the embodiment of
Since the device for producing croissant dough, the device for flattening the croissant dough, the cutter for cutting the flattened croissant dough, the device for rolling up the cut croissant dough, the chamber for causing the croissant dough to rise, and the oven for baking the risen croissant dough, may be known ones, the detailed discussion for them is omitted. Further, a combined device, such as a device for producing and flattening croissant dough that is a combination of the device for producing croissant dough and the device for flattening the croissant dough, may be used. Further, some of the devices may possibly not be included. For example, if croissant dough that has been kneaded and folded is carried to the system, then the device for producing croissant dough may not be included.
Next, a method for producing croissant dough by using the system for producing croissants 1 that includes the device for forming the croissant dough in a U-shape 10 and the device for circularizing the croissant dough 100 is discussed. Raw material for the croissant dough, such as flour, sugar, salt, butter, and yeast, are kneaded with water by a mixer to produce dough. The device for producing the croissant dough interfolds fat with sheet-like dough and folds the roll-in dough to produce croissant dough that is a laminate of the dough and the fat. The croissant dough is conveyed to the device for flattening the croissant dough to be flattened into a thin sheet. Next, the cutter cuts out triangular sheets of the croissant dough from the flattened croissant dough. The device for rolling up the dough rolls up the triangular sheets of the croissant dough so that the center is thick, but becomes less thick toward the ends. Specifically, the triangular sheet is rolled up from the base to the top of the triangle. The bar-shaped croissant dough 3 that has been rolled up is placed on the conveyor 22 as in
The croissant dough 3 that is conveyed by the conveyor 22 is transferred to the downstream conveyor 24. The croissant dough 3 is also conveyed on the conveyor 24 so that its longitudinal axis is perpendicular to the direction for conveyance. The water feeder 70 is provided on the conveyor 24. When the croissant dough 3 passes by the water feeder 70 the sponge 74 of the water feeder 70 contacts an end of the croissant dough 3 (the end that is the lower one in
The croissant dough 3, a part of which water is attached to, is transferred to the downstream conveyor 26. The croissant dough 3 is also conveyed on the conveyor 26 so that its longitudinal axis is perpendicular to the direction for conveyance. First the croissant dough 3 on the conveyor 26 is conveyed to the position under the belts for suppressing and rolling the croissant dough 60. Further, it is conveyed to the device for grooving 50. There two grooves 6 are made by the blades 52 on the thick portion that is rolled up.
The croissant dough 3 that is grooved with grooves 6 contacts the belts 60. It is transported by the conveyor 26 and the belts 60 in the downstream direction. The rate for the transportation of the belts 60 is less than that of the conveyor 26 or the direction for the transportation of the belts 60 is reverse to that of the conveyor 26. Thus the croissant dough 3 is rolled about its longitudinal axis by about 90 degrees. By being rolled, the grooves 6 on the croissant dough 3 face upward.
The first sensor for detecting the croissant dough 38 detects that the rolled croissant dough 3 is passing through a predetermined position. When the sensor 38 detects the croissant dough 3 a signal is sent to the controller (not shown) so that the controller generates a signal to timely activate the device for the center pin 30. Here, “timely” means the timing for the center pin 32 to push the croissant dough 3 that is conveyed on the conveyor 26 before it reaches the side belts 40 so as to feed it to the side belts 40. The side belts 40 may be activated by a signal from the sensor 38.
The croissant dough 3 is pushed by the center pin 32 at its center while being conveyed by the conveyor 26. Since the center is pushed, the croissant dough 3 is formed to be an arc where the center advances to the downstream direction further than do the ends. Since the grooves 6 are made in the upstream portion of the croissant dough 3, the croissant dough 3 is easily formed to be an arc where the center advances to the downstream direction than do the ends.
The croissant dough 3 that is pushed by the center pin 32 at the center and that is deformed to be an arc where the center advances to the downstream direction further than do the ends is fed to the space between the pair of side belts 40. There the center pin 32 moves upward by the rotation of the belt for the center pin 34 and separates from the croissant dough 3. Since the arc-shaped croissant dough 3 moves to the space between the pair of side belts 40 that is narrower than the distance between the ends of the croissant dough 3, that distance narrows to equal the distance between the side belts 40 so that the croissant dough 3 becomes U-shaped. The U-shaped croissant dough 5 is conveyed by the conveyor 26 and the side belts 40 at the rate for conveyance V.
The lengths L1, L2 of the legs of the U-shape of the U-shaped croissant dough 5 are measured by the sensor 48 (see
Based on the lengths L1, L2 of the legs as measured by the sensor 48 or the distance L3 between the positions of the tips of the legs, the rates for transporting the respective legs Va, Vb by the side belts 40a, 40b are adjusted. As shown in
The second sensor for detecting the croissant dough 138 detects that the croissant dough 5 with the legs that have their lengths arranged to have the same length is passing through a predetermined position. When the sensor 138 detects the croissant dough 5 a signal is sent to the controller (not shown). The controller generates a signal to timely stop the conveyor 122 and a signal to timely activate the principal part 102. Here, “timely” means timing for the croissant dough 5 to reach the working positions for the principal part 102.
When the croissant dough 5 reaches the working positions for the principal part 102, the conveyor 122 stops so that the croissant dough 5 remains in the working positions for the principal part 102. Or, the croissant dough 5 may be clamped by the holders 110 and 120 so that it is not conveyed so as to remain in the working positions for the principal part 102. Or, the principal part 102 as a whole may be moved in the downstream direction at the same speed as that of the conveyor 122 so that the croissant dough is circularized.
Below, with reference to
The plate 118 that is placed on the conveyor 122 moves to the center of the conveyor 122 so as to slip under the second end 5b. After the plate 118 slips under the second end 5b, the plate 118 and the second guide for reducing the width 116 move upward to lift the second end 5b. The height h to which the second end 5b is to be lifted is one where the lower face of the second end 5b is higher than the upper face of the first end 5a.
After the second end 5b is lifted, the second guide for reducing the width 116 moves on the plate 118 to the center of the conveyor 122 as in
When the second end 5b is moved to the center, since the plate 118 does not support it, it is lowered to overlap the first end 5a. If the second end 5b is moved to the center before the first end 5a does so, the first end 5a must be moved to the center before the second end 5b is lowered to the height of the upper face of the first end 5a. The first end 5a and the second end 5b are the portions of the croissant dough 5 from the tips to the overlapped part. Though one of the tips overlaps the other in
After the second end 5b is moved to the center, the plate 118 is lowered to the face of the conveyor 122 as in
As shown in
After the pusher 130 vertically presses the first end 5a and the second end 5b, it blows air A through the hole for blowing air 136 as in
After the first and second ends 7a, 7b are pressed to be stuck together, the holders 110, 112, the first guide 114, the second guide 116, and the plate 118 retract as in
The circularized croissant dough 7 is transferred to the downstream conveyor 124. The third sensor 148 detects when the circularized croissant dough 7 is passing through a predetermined position. When the sensor 148 detects the croissant dough 7 a signal is sent to the controller. The controller sends a signal to timely stop the conveyor 124 and a signal to timely activate the second holders 140, 142. Here, “timely” means the timing for the croissant dough 7 to reach the working positions for the second holders 140, 142 and the second pusher 144.
As shown in
As shown in
After the second pusher 144 vertically presses the first and second ends 7a, 7b, it blows air A through the hole for blowing air 146 as in
After the first and second ends 7a, 7b are pressed by the second pusher 144, the second holders 140, 142 retract as in
The discussion on the method for producing the croissants by using the system for producing croissants 1 is now continued. The circularized and rounded croissant dough 7 is transferred from the conveyor 124 to the conveyor 150. The face for conveyance of the conveyor 150 is lower than that of the conveyor 124 so that a gap is provided between the conveyor 124 and the conveyor 150. The height of the gap is determined so that the croissant dough is turned over when it drops over the gap. That is, the two faces of the croissant dough 7 are altered. Thus the croissant dough 7 that is placed on the conveyor 124 so that the thick portion is at the upstream side and the stuck ends 7a, 7b are at the downstream side is turned and is placed on the conveyor 150 so that the stuck ends 7a, 7b are at the upstream side and the thick portion is at the downstream side. In the embodiment of
The turned over croissant dough 7 is conveyed to the chamber for causing croissant dough to rise. The chamber for causing croissant dough to rise is heated at the temperature that is suitable for causing the croissant dough 7 to rise. In the chamber the croissant dough 7 is heated at a predetermined temperature for a predetermined time, to cause it to rise. As the croissant dough 7 rises, it becomes large. When it becomes large, a force to return its shape to a bar is generated. However, since the end 7b overlaps the end 7a and they are vertically pressed to be stuck together, they do not easily separate, and so the circle is maintained. In fact, the croissant dough 7 rises at room temperature. However, rising at room temperature is slow. The degree to rise during the conveyance from the device for producing the croissant dough to the chamber for causing the croissant dough to rise is generally so little that assuming that no dough rises at room temperature causes no substantial problem. The croissant dough may rise at room temperature for a long time without heating it in the chamber.
The croissant dough that has risen in the chamber for causing the croissant dough to rise is conveyed to the oven for baking. At the oven the risen croissant dough is baked to become complete croissants. The croissant dough is turned over when it is transferred from the conveyor 124 to the conveyor 150 so that the end of the rolled up dough is directed toward the inside, and it is baked. Thus the appearance of the baked croissants matches the common image of the croissants. The baked croissants are taken out from the oven to be sent to the following step, such as packing.
As discussed above, by the system for producing croissants 1, while being continuously conveyed by the conveyors 20, 12, 150 the rolled-up croissant dough 3 is formed to be in a U-shape, the lengths L1e, L2e of the legs of the U-shape are arranged to have the same length, the croissant dough 5 is circularized to form the circularized croissant dough 7, and the circularized croissant dough 7 is caused to rise, and then baked. Thus the croissants are quickly produced. That is, many croissants are produced. Further, since the lengths of the legs of the U-shaped croissant dough 5 are arranged to have the same length, and the length of the overlapped portion of the ends 5a, 5b is easily regulated when the croissant dough 5 is circularized, and the length L4 of the stuck ends is easily regulated, croissants in a desired shape can be quickly and stably produced. Further, since the end 5b of the croissant dough 5 overlaps the end 5a, and they are vertically pressed to be stuck together, the parts that are stuck together do not separate while being caused to rise. Thus the circularized shape is maintained. Further, since water is attached to the parts 5a 5b to be stuck together, they are strongly stuck together.
By the device for forming the croissant dough in a U-shape 10 or the method for forming the croissant dough in a U-shape as discussed above, the lengths L1, L2 of the legs of the U-shaped croissant dough 5 are arranged to have the same length by adjusting the rates of the pair of side belts 40. Thus the lengths L1e, L2e of the legs are accurately and quickly arranged to have the same length.
Further, since the contacting condition between the pair of side belts 40 and the croissant dough 5 is less slippery than the contacting condition for conveying the croissant dough 5 by the conveyor 28, the lengths L1e, L2e of the legs can be easily arranged to have the same length by adjusting the rate of each of the side belts 40.
By the device for circularizing the croissant dough 100 or the method for circularizing the croissant dough as discussed above, since the U-shaped croissant dough 5 that is being conveyed by the conveyor 122 is circularized, it is quickly circularized. Further, since the ends 5a, 5b of the croissant dough 5 overlap and are vertically pressed to be stuck together, the stuck ends 7a, 7b can be separated from each other only with difficulty. Thus, even when the croissant dough becomes large because it rises later, the circularized shape can still be maintained. That is, the croissant dough 7 is stably circularized.
Further, since the holders 110, 112 enfold the legs of the U-shaped croissant dough 5 from the sides to move the ends 5a, 5b to the center of the U-shape, the croissant dough 5 as a whole does not move, so that the ends 5a, 5b are reliably moved to the center. Thus the croissant dough 7, or the croissants, are produced in a desired shape.
Further, since the holder 110 and the first guide for reducing the width 114 are integrated so that the croissant dough 5 is enfolded from the sides by the holders 110, 112 at the same time as the first end 5a is moved to the center by the first guide 114, the cost for the device can be saved, the reliability of the device is increased, and the croissant dough 7 is quickly circularized.
Further, since the sensor 138 detects the croissant dough 5 that is being conveyed by the conveyor 122 and the conveyor 122 is stopped while the position to stop is adjusted so that the principal part 102 is activated, the length L4 of the overlapping portion of the first end 5a and the second end 5b is regulated to form the croissant dough 5 in a desired shape.
Further, since the time for the pusher 130 to press the first end 5a and the second end 5b and the height of the pusher 130 to be lowered for pressing them are adjustable, the degree (strength) to cause the first and second ends 7a, 7b to be stuck together is regulated. Thus the croissants in a desired shape after baking can be produced.
Further, since the walls that consist of the face 114f of the first guide 114 that moves the first end 5a and the face 116f of the second guide 116 that moves the second end 5b are provided for the overlapping ends 5a, 5b, and the pusher 130 presses the ends 5a, 5b between the walls, the ends 5a, 5b do not spread, and so can be securely stuck together.
Further, since the stuck ends 7a, 7b are vertically pressed by the second pusher 144, which is wide, the circularized croissant dough 7 is rounded. Thus the croissant dough 7, or the croissants, are produced in a desired shape.
Further, since the hole for blowing air 136 is formed in the pusher 130 so that air A is blown after the pusher 130 presses the ends 5a, 5b, the pusher 130 is separated from the stuck ends 7a, 7b by means of the air A. Thus the shape of the stuck ends 7a, 7b is not changed by the pusher 130, which moves upward.
Further, by adjusting the time for the pusher 130 to press the first end 5a and the second end 5b and the height of the pusher 130 to be lowered, the degree (strength) to cause the ends 7a, 7b to be stuck together can be adjusted so that the length of the overlapped portion of the product (baked croissants) is changed. By adjusting the position to stop the croissant dough 5 in the direction for conveyance in relation to the pusher 130, the length L4 of the stuck legs (see
Though the device for forming the croissant dough in a U-shape 10 is explained to show that it feeds the U-shaped croissant dough 5 that has the legs with the same length to the device for circularizing the croissant dough 100, it may feed the U-shaped croissant dough 5 to a device other than the device for circularizing the croissant dough 100, such as a device for pinching dough parts as in U.S. Patent Application No. 2011/0097467. It may form bar-shaped dough with a thick center, but not the croissant dough 5, to be in a U-shape, and may arrange the legs to have the same length.
Further, though the pair of side belts 40 is explained to show that they form the croissant dough 3 that is fed by the device for the center pin 30 in a U-shape and to show that the side belts 40 arrange the legs to have the same length, the side belts 40 may be used for arranging the legs of croissant dough to have the same length, which croissant dough is preliminarily formed in a U-shape without using the device for the center pin 30.
Though the device for circularizing the croissant dough 100 is explained to show that it circularizes the croissant dough 5 that is formed in a U-shape by the device for forming the croissant dough in a U-shape 10, the U-shaped croissant dough 5 may be supplied from a device other than the device for forming the croissant dough in a U-shape 10.
Further, though the device for circularizing the croissant dough 100 is explained to show that it comprises the holders 110, 112 to enfold the croissant dough 5 from the sides, it may be comprise no holders 110, 112 to enfold the croissant dough 5 from the sides and may move the ends 5a, 5b toward the center.
Further, though the device for circularizing the croissant dough 100 is explained to show that the walls are provided by the face 114f of the first guide for reducing the width 114 and the face 116f of the second guide for reducing the width 116 so that the pusher 130 presses the ends 5a, 5b between the walls, the pusher 130 may press the ends 5a, 5b without the walls being provided.
Further, though the device for circularizing the croissant dough 100 is explained to show that it comprises the second pusher 144 and its related structures, it may comprise neither the second pusher 144 nor the related structures. Further, though it is explained to show that the second holders 140, 142 enfold the croissant dough 7 from the sides so that the second pusher 144 presses the ends 7a, 7b, it may comprise no second holders 140, 142, and the second pusher 144 may press the ends 7a, 7b without enfolding the croissant dough 7 from the sides.
Further, in the device for circularizing the croissant dough 100 the plate 118 may not lift the second end 5b. The second guide for reducing the width 116 may not vertically move. In this case, the first end 5a and the second end 5b are vertically pressed by the pusher 130 when they form a row in the width direction, and one end does not overlap the other end. Thus they are stuck together, but the degree is low. Therefore, when the croissant dough has risen or has been baked they may become unstuck so that the croissant dough is in a C-shape, not in a circle. If C-shaped or crescent-shaped croissants are to be produced, the device for circularizing the croissant dough 100 may be used by not vertically moving the plate 118 and the second guide for reducing the width 116.
In the device for circularizing the croissant dough 100, if neither the plate 118 nor the second guide for reducing the width 116 is vertically moved, the first end 5a and the second end 5b that are moved to the center of the U-shape may not be vertically pressed by the pusher 130. The croissant dough may tend to be a bar when it has risen or has been baked. However, depending on the Elasticity of the croissant dough, or on the degree to which it becomes large while being caused to rise, or on the required shape of the croissants as products, the croissant dough may be caused to rise and be baked without sticking the first end 5a and the second end 5b together.
Though the system for producing croissants 1 is explained to show that it comprises the water feeder 70 to attach water to the part of the ends 5a, 5b to be stuck together, it may comprise no water feeder 70 and comprise no water being attached to the part to be stuck to the other part.
Though the croissant dough that is formed by the side belts 40 and the principal part 102 and by the second holders 140, 142 and the second pusher 144, is explained to show that the legs are positioned in the downstream side of the central portion, to the contrary it may be formed so that the legs are positioned in the downstream side of the central portion, and the devices may be configured to fit that positioning. In this case the croissant dough is preliminarily formed in a U-shape to be fed to the side belts 40. For example, the apparatus disclosed by European Patent Application No. 1132003 may be used for the device for forming the croissant dough in a U-shape.
Below, the main reference numerals and symbols that are used in the detailed description and drawings are listed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2013-208900 | Oct 2013 | JP | national |
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| 2011144191 | Nov 2011 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20150099049 A1 | Apr 2015 | US |
