METHOD AND APPARATUS TO PROVIDE MARKING ON BREAD

Abstract: Apparatus (10) is for use in making bread to provide marking on the resulting bread. The apparatus (10) comprises a proving box (12), an oven (16) and a conveyor (14) to convey dough from the proving box (12) to the oven (16). Nozzles (18) on a gantry (17) over the conveyor belt (14) spray water on to a surface of the dough for the bread on the conveyor belt (14). A vibration hopper (20) on a second gantry (19) downstream of the first deposits flour through a stencil (28) onto the dough on the conveyor belt (14) so that flour is retained by the moisture on the dough in a pattern determined by the stencil (28).

Description: METHOD AND APPARATUS TO PROVIDE MARKING ON BREAD The invention relates to a method and apparatus for use in making bread to provide marking on the resulting bread. It is known to indent a word into the side of a baking tin in which dough is baked to make bread so that the resulting bread has the word spelt out in relief. It can be difficult to make out the word created in this way. According to one aspect of the invention, there is provided a method for use in making bread to provide marking on the resulting bread, the method comprising the steps of depositing moisture on a surface of the dough for the bread, depositing flour or the like on the said surface of the dough, one or both of the flour or the like and the moisture being deposited in a desired predetermined pattern so that flour is retained by moisture on the dough in a predetermined pattern, and baking the dough. In this way, a word, picture or other desired pattern can be produced on the bread and the use of flour or the like results in a pale contrast with the remainder of the loaf so that the word, picture or other pattern is readily understood or recognised. Furthermore, even if the pattern is rubbed, as the process results in the pattern being shallowly indented, flour tends to remain at the edges of the pattern where there is an abrupt change in the surface level so that the contrasting pattern is still clear in outline. The term 'flour or the like" is intended to include wheat flour as well as corn flour, starches and flour substitutes. The moisture is preferably water or principally water. In another embodiment the moisture is milk or a mixture of milk and water. In a further embodiment the moisture is a combination of egg and water and in a further embodiment the moisture is a solution of sugar or the like in water. The method may include the step of proving the dough for the bread and the moisture may be deposited during proving for example as a result of raised humidity, or may be deposited after proving. The moisture may be deposited in any suitable manner and may be deposited by spraying. Preferably the flour is deposited in a predetermined pattern. The flour or the like may be deposited on the dough in any desired manner and may be deposited through a stencil to achieve the predetermined pattern. Preferably, the stencil is arranged less than 3cm from the surface of the dough. According to another aspect of the invention, there is provided apparatus for use in making bread to provide marking on the resulting bread, the apparatus comprising an oven, means defining a pathway to the oven, means on the pathway upstream of the oven for depositing moisture on a surface of the dough for the bread, and means on the pathway between the moisture depositing means and the oven for depositing flour or the like on the said surface of the dough, one or both of the moisture depositing means and the flour depositing means being arranged to deposit in a predetermined pattern so that flour is retained by moisture on the dough in a predetermined pattern. The moisture depositing means may take any suitable form and may comprise a proving box. In another embodiment, the moisture depositing means comprises means for spraying moisture onto the dough. Preferably the flour depositing means is arranged to deposit in a predetermined pattern. The means to deposit the flour or the like may take any suitable form and may include a stencil. The stencil is preferably arranged less than 3cm from the anticipated level of the surface of the dough. The flour depositing means may include vibration means. The vibration means is preferably arranged to vibrate substantially in the direction of intended deposition. This reduces any lack of definition in the pattern due to the vibration. The apparatus may include conveying means for conveying dough along the pathway, the conveying means defining the pathway. The conveying means may comprise a conveyor belt. The apparatus may include means to stop the movement of the dough along the pathway when the dough is aligned with the means for depositing flour. Where conveying means is provided, the apparatus may include means to stop the conveying means when the dough is aligned with the means for depositing flour. The stopping means may include a sensor to sense the position of the dough and the sensor may include a photocell. According to another aspect of the invention, there is provided a kit for use in making bread to provide marking on the resulting bread, the kit comprising means for depositing moisture on a surface of the dough for the bread and means for depositing flour or the like on the said surface of the dough, one or both of the moisture depositing means and the flour depositing means being arranged to deposit in a predetermined pattern so that flour is retained by moisture in the dough, in a predetermined pattern. An embodiment of the invention will now be described by way of example and with reference to the accompanying drawings, in which: Fig. 1 is a schematic plan view of the apparatus of the embodiment of the invention; Fig. 2 is a detail side elevation at A-A' of the apparatus of Fig. 1; and, Fig. 3 is an end elevation in partial cross-section at B-B' of the apparatus of Fig. 1. The apparatus 10 of the embodiment as shown in Fig. 1 includes a proving box 12 and a conveyor belt 14 to convey dough from the proving box 12 to an oven 16 in the direction of the arrow. There are two gantries 17,19 spanning the conveyor belt 14. The first gantry 17, which is adjacent the proving box 12, supports a plurality of water spraying nozzles 18 over the conveyor belt 14. The second gantry 19, which is adjacent the first gantry 17, supports a vibration hopper 20 shown in more detail in Fig. 2. The vibration hopper 20 consists of an open topped hopper 22 to be agitated by a pneumatic ram 24 located on one side of the hopper 22 and arranged to vibrate the hopper 22 in a substantially vertical direction. The hopper 22 consists of continuous side walls 26 which are angled slightly outwardly and a horizontal floor. The horizontal floor of the hopper 22 is formed of a stencil 28 which may for example include two groups of apertures, ^ach in a pattern to spell out the word "organic". The stencil 28 is preferably very accurately cut and may be laser cut from sheet metal which may be several millimetres thick. A sieve 30 is located above the stencil 28 and entirely covers the floor of the hopper 22. A powered agitator 31 is provided above the sieve 30 to agitate flour in the hopper 22 to prevent compacting of the flour. A photocell sensor 32 is supported on the vibration hopper gantry 19 to sense interruption of a horizontal light beam passing across the conveyor belt 14. In use, dough will be made up and put on trays 34. Pieces of dough 36 on the trays 34 will arrive in the proving box 12. After proving at raised humidity and temperature, each tray 34 is transported out of the proving box 12 on the conveyor belt 14 to pass under the first gantry 17 which emits a continuous fine spray of water from the spraying nozzles 18 to leave a continuous uniform layer of water on the upper surface of the pieces of dough 36. The conveyor belt 14 continues to move until the leading edge of one of the pieces of dough 36 interrupts the light beam to the photosensor 32. The photosensor 32 thus sends a signal to the motor (not shown) operating the conveyor belt 14 so that the motor stops the conveyor belt 14. In this position, two pieces of dough 36 on the tray 34 are aligned with the vibration hopper 22 underneath the stencil 28. Once the conveyor belt 14 has stopped, a signal is sent to the pneumatic cylinder 24 to vibrate the hopper 22 which results in flour passing through the sieve 30 and through the stencil 28 to be deposited on the moist upper surface of the two pieces of dough. Each piece of dough 36 thus receives flour in a pattern to spell the word "organic". The vertical distance X in Fig. 2 between the top of the two pieces of dough 36 and the lower surface of the stencil 28 is controlled to be about 30mm. After the flour has been deposited, the vibration is stopped, the conveyor belt 14 is started again by its motor and the next two pieces of dough on a tray come forwards. The dough is conveyed by the conveyor belt 14 into the oven 16 to be baked and the flour which has stuck to the moist surface of the dough is baked on. It thus forms a white or off-white pattern on the brown surface of the loaf which is clearly legible. The area of the surface of the dough where the flour is received will not rise as well as the dough around it and so there is a slight indentation under the flour. Thus, if the flour is rubbed off the marking will remain as an indentation. In any case, as the pattern is hard edged there tends to be a lip at the edges which acts to retain flour even if flour has been rubbed off elsewhere so that the pattern remains in outline at least. In another embodiment, the humidity of the proving box 12 is so high that a continuous layer of moisture results and the first gantry 17 and water spraying nozzles 18 are not required. In a further embodiment, the water may be sprayed to cover only a narrow strip along the centre of each piece of dough 36 where the flour is to be deposited. In another embodiment the water may be applied by contact with an absorbent body such as a brush or sponge. The stenci 1 28 may spell any desired word or may define a picture or abstract design for example. While an automated system has been described, the method could be carried out under manual control.

Claims: CLAIMS 1. A method for use in making bread to provide marking on the resulting bread, the method comprising the steps of depositing moisture on a surface of the dough for the bread, depositing flour or the like on the said surface of the dough, one or both of the flour or the like and the moisture being deposited in a desired predetermined pattern so that flour is retained by moisture on the dough in a predetermined pattern, and baking the dough. 2. A method as claimed in claim 1 , wherein the moisture is water or principally water. 3. A method as claimed in claim 1 , wherein the moisture is milk or a mixture of milk and water. 4. A method as claimed in claim 1 , wherein the moisture is a combination of egg and water. 5. A method as claimed in claim 1 , wherein the moisture is a solution of sugar or the like in water. 6. A method as claimed in any preceding claim, wherein the method includes the step of proving the dough for the bread and the moisture is deposited during proving. 7. A method as claimed in claim 6, wherein the moisture is deposited by means of raised humidity. 8. A method as claimed in any of claims 1 to 5, wherein the method includes the step of proving the dough for the bread and the moisture is deposited after proving. 9. A method as claimed in any of claims 1 to 5, wherein the moisture is deposited by spraying. 10. A method as claimed in any preceding claim, wherein the flour is deposited in a predetermined pattern. 1 1. A method as claimed in claim 10, wherein the flour or the like is deposited through a stencil to achieve the predetermined pattern. 12. A method as claimed in claim 11, wherein the stencil is arranged less than 3 cm from the surface of the dough. 13. Apparatus for use in making bread to provide marking on the resulting bread, the apparatus comprising an oven, means defining a pathway to the oven for dough for bread, means on the pathway for depositing moisture on a surface of the dough for the bread, and means on the pathway between the moisture depositing means and the oven for depositing flour or the like on the said surface of the dough, one or both of the moisture depositing means and the flour depositing means being arranged to deposit in a predetermined pattern so that flour is retained by moisture on the dough in a predetermined pattern. 14. Apparatus as claimed in claim 13, wherein the moisture depositing means comprises a proving box. 15. Apparatus as claimed in claim 13, wherein the moisture depositing means comprises means for spraying moisture onto the dough. 16. Apparatus as claimed in claims 13, 14 or 15, wherein the flour depositing means is arranged to deposit in a predetermined pattern. 17. Apparatus as claimed in claim 16, wherein the means to deposit the flour or the like includes a stencil. 18. Apparatus as claimed in claim 17, wherein the stencil is arranged less than 3cm from the anticipated level of the surface of the dough. 19. Apparatus as claimed in any of claims 13 to 18, wherein the flour depositing means includes vibration means. 20. Apparatus as claimed in claim 19, wherein the vibration means is arranged to vibrate substantially in the direction of intended deposition. 21. Apparatus as claimed in any of claims 13 to 20, wherein the apparatus includes conveying means for conveying dough along the pathway, the conveying means defining the pathway. 22. Apparatus as claimed in any of claims 13 to 21 , wherein the apparatus includes means to stop the movement of the dough along the pathway when the dough is aligned with the means for depositing flour. 23. Apparatus as claimed in claim 22, wherein where conveying means is provided, the apparatus includes stopping means to stop the conveying means when the dough is aligned with the means for depositing flour. 24. Apparatus as claimed in 23, wherein the stopping means includes a sensor to sense the position of the dough. 25. Apparatus as claimed in 24, wherein the sensor includes a photocell. 26. A kit for use in making bread to provide marking on the resulting bread, the kit comprising means for depositing moisture on a surface of the dough for the bread and means for depositing flour or the like on the said surface of the dough, one or both of the moisture depositing means and the flour depositing means being arranged to deposit in a predetermined pattern so that flour is retained by moisture on the dough in a predetermined pattern. 27. A kit as claimed in claim 26, wherein the moisture depositing means comprises means for spraying moisture onto the dough. 28. A kit as claimed in claim 26 or claim 27, wherein the flour depositing means is arranged to deposit in a predetermined pattern. 29. A kit as claimed in claim 28, wherein the means to deposit the flour or the like includes a stencil. 30. A kit as claimed in any of claims 26 to 29, wherein the flour depositing means includes vibration means. 31. A kit as claimed in claim 30, wherein the vibration means is arranged to vibrate substantially in the direction of intended deposition. 32. A kit as claimed in any of claims 26 to 31 , wherein the kit includes conveying means for conveying dough along a pathway. 33. A kit as claimed in claim 32, wherein the kit includes stopping means to stop the conveying means when the dough is aligned with the means for depositing flour. 34. A kit as claimed in claim 33, wherein the stopping means includes a sensor to sense the position of the dough. 35. A kit as claimed in claim 34, wherein the sensor includes a photocell.

Inventors: BRIAN ARTHUR CLARKE, BRIAN, ARTHUR, CLARKE
Applicants: BRIAN ARTHUR CLARKE, WILLIAM PRICE AND SONS LTD, BRIAN, ARTHUR, CLARKE, WILLIAM PRICE AND SONS LTD.
Application year: 2000
Main classification: A21D13
IPC codes: A21C9, A21D8, A21D13