IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0580129
(1984-04-16)
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발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
Davis, Hoxie, Faithfull & Hapgood
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인용정보 |
피인용 횟수 :
17 인용 특허 :
5 |
초록
▼
The disclosure concerns an integral weigh wrapper for wrapping products in stretch film, by weighing each product as it is placed on an infeed support surface, and feeding successive weight signals to a data processor. Successive signals are compared, and when a stabilized weight signal is received,
The disclosure concerns an integral weigh wrapper for wrapping products in stretch film, by weighing each product as it is placed on an infeed support surface, and feeding successive weight signals to a data processor. Successive signals are compared, and when a stabilized weight signal is received, as determined by the successive comparisons, the data processor produces a start signal which activates a drive motor to rotate one revolution. This initiates one cycle of operation of the weigh wrapper, in which the product is advanced from the infeed station to the wrapping station, a wrapping cycle is initiated for any product then in the wrapping station, and a previously wrapped product is advanced to a printing and labeling station--where it is automatically indexed, a printed label pneumatically applied to a selected location on the wrapper, and the wrapped and labeled product outputted.
대표청구항
▼
1. A method for weighing, stretch wrapping and labelling a trayed product in a unitary weighing and wrapping machine for use in supermarkets, retail stores, and the like, comprising: manually placing an unwrapped trayed product to be weighed and wrapped on a scale in a weighing station that is an
1. A method for weighing, stretch wrapping and labelling a trayed product in a unitary weighing and wrapping machine for use in supermarkets, retail stores, and the like, comprising: manually placing an unwrapped trayed product to be weighed and wrapped on a scale in a weighing station that is an integral part of said machine; weighing the trayed product while it is on said scale before it is wrapped, including generating an electrical signal corresponding to the weight of the unwrapped trayed product; withdrawing a length of stretch wrapping film from a film supply, to have the length of film extend through a region that lies, in the path of product flow through said machine, between the weighing station and a sealing station that is an integral part of said machine, the sealing station being disposed downstream of the weighing station in the direction of said product flow; enveloping the top portion of the product in the length of stretch wrapping film after the product has been weighed; tucking at least one edge of the film under the tray bearing the product; advancing said trayed product and the length of enveloping stretch wrapping film along the path of product flow to said sealing station, to thereby further envelop the trayed product in the stretch wrapping film while the trayed product is being advanced to the sealing station; severing the length of stretch wrapping film, the severing occurring at a point disposed between said scale and said sealing station, before said product is completely wrapped in said stretch film; sealing at least certain of the tucked edges under the tray in the sealing station; and applying a label to said stretch wrapping film, after it has been stretched, to specify the weight of the unwrapped trayed product in accordance with said electrical signal, after the film has been tucked under at least certain of the edges of the tray. 2. The method of claim 1 wherein the label is applied to the stretch wrapping film at a location downstream of the sealing station in the direction of product flow. 3. The method of claim 1, further including the step of maintaining said electrical signal stored in digital form in a memory device, while said product is being wrapped. 4. A method for weighing, stretch wrapping and labelling a product in a unitary weighing and wrapping machine for use in supermarkets, retail stores, and the like, comprising: manually placing an unwrapped product to be weighed and wrapped on a scale in a weighing station that is an integral part of said machine; weighing the product while it is on said scale before it is wrapped, including generating an electrical signal corresponding to the weight of the unwrapped product; withdrawihg a length of stretch wrapping film from a film supply, to have the length of film extend through a region that lies, in the path of product flow through said machine, between the weighing station and a sealing station that is an integral part of said machine, the sealing station being disposed downstream of the scale in the direction of said product flow; enveloping the top portion of the product in the length of stretch wrapping film after the product has been weighed; tucking at least one edge of the film under the product; advancing said product and the length of enveloping stretch wrapping film along the path of product flow to said sealing station, to thereby further envelop the product in the stretch wrapping film while the product is being advanced to the sealing station; severing the length of stretch wrapping film, the severing occurring at a point disposed between said scale and said sealing station, before said product is completely wrapped in said stretch film; sealing at least certain of the tucked edges under the product in the sealing station; and applying a label to said stretch wrapping film after it has been stretched, to specify the weight of the unwrapped product in accordance with said electrical signal, after the film has been tucked under the product. 5. The method of claim 4, wherein the label is applied to the stretch wrapping film at a location downstream of the sealing station in the direction of product flow. 6. The method of claim 4, further including the step of maintaining said electrical signal stored in digital form in a memory device, while said product is being wrapped. 7. The method of claim 6, wherein the step of enveloping the top portion of the product in the length of stretch wrapping film includes the steps of advancing the product from the weighing station, after it has been weighed, to a product support table, for supporting the product while it is being wrapped, clamping the length of stretch wrapping film above the product support table, and advancing the product support table into the clamped stretch wrapping film. 8. The method of claim 7, wherein the step of tucking at least one edge of the film under the product includes the step of actuating folding members for folding the edges of the film under the product. 9. The method of claim 8, further including the steps automatically advancing said unwrapped product from said weighing station to said product support table in response to the receipt of at least said electrical signal corresponding to the weight of said unwrapped product; automatically wrapping said product in said length of stretch wrapping film in response to the receipt of at least an electrical signal corresponding to the weight of a first subsequently received unwrapped product; automatically transferring the wrapped product through said sealing station in response to the receipt of at least an electrical signal corresponding to the weight of a second subsequently received unwrapped product; and automatically applying said label to the wrapped and sealed product in response to the receipt of at least an electrical signal corresponding to the weight of a third subsequently received unwrapped product. 10. A unitary weighing and stretch wrapping machine for use in supermarkets, retail stores, and the like, comprising: a weighing station forming an integral part of said machine, and having a weighing platform for receiving an unwrapped product; weight sensing means in said weighing station coupled to said platform to generate an electrical signal corresponding to the weight of said product independent of any stretch wrapping material; a sealing station forming an integral part of said machine, downstream of said weighing station in the path of product flow through said machine; film supply means for supplying a length of stretch wrapping film which extends through a region that lies between said weighing station and said sealing station, in the path of said product flow, to wrap said product as it is moved from said weighing station to said sealing station, by enveloping the top portion of the product in said length of stretch film, advancing said product and the length of enveloping stretch wrapping film to said sealing station to thereby further envelop the product in the stretch wrapping film, and tucking two or more edges of said stretch film underneath said product; film severing means forming an integral part of said machine and disposed between said weighing station and said sealing station, for severing said length of stretch film from said film supply means before said product is completely wrapped in said stretch film; said sealing station adapted to seal the edges of said stretch film under said product; and a labelling station for producing a label to specify the weight of the unwrapped product, in accordance with said electrical signal, for application to the wrapped product after the edges of said stretch film are sealed under said product. 11. The machine of claim 10, further including digital storage means for maintaining said electrical signal stored in digital form, while said product is being wrapped. 12. A method for weighing, wrapping and labeling a product on a tray, comprising manually placing a trayed product to be weighed and wrapped on a surface in a weighing station, weighing the trayed product while it is on said surface before it is wrapped, including generating an electrical signal corresponding to the weight of the product and storing said signal in a memory device, withdrawing a length of stretch wrapping film from a film supply to have the length of film extend through a region that lies between the weighing station and a sealing station, moving the trayed product into the length of stretch wrapping film, tucking at least the leading edge of the film under the tray bearing the product, advancing said trayed product and the length of stretch wrapping film to a sealing station, tucking at least one of the edges of said stretch film under an edge of said tray while the trayed product is being advanced to the sealing station, sealing the tucked edges under the tray in the sealing station, and applying a label to said stretch film after it has been stretched to specify the weight of the product in accordance with the weight signal stored in the memory device, after the film has been tucked under at least certain of the edges of the tray. 13. The method of claim 12 wherein the step of moving the trayed product into the length of stretch wrapping film serves to stretch the film about the product, and the step of tucking at least one of the edges under the tray while the trayed product is being advanced to the sealing station occurs after the trayed product has been moved into the film. 14. The method of claim 12 further including the step of stretching the length of stretch wrapping film before the trayed product is moved into said length of film. 15. The method of claim 12 wherein the step of tucking at least one of the edges under the tray while the trayed product is being advanced to the sealing station includes restraining the trailing edge of the film at least during the initial advancement of the trayed product to the sealing station, to cause the trailing edge of the film to tuck under the tray. 16. A method for weighing, wrapping and labeling a product on a tray, comprising manually placing a trayed product to be weighed and wrapped on a surface in a weighing station, weighing the trayed product while it is on said surface before it is wrapped, including generating an electrical signal corresponding to the weight of the product and storing said signal in a memory device, withdrawing a length of stretch wrapping film from a film supply to have the length of film extend through a region that lies between the weighing station and a sealing station, pre-stretching said length of film in the direction perpendicular to the direction of withdrawal, moving the trayed product into the prestretched length of film, tucking at least the leading edge of the film under the tray bearing the product, advancing said trayed product and the length of stretch wrapping film to a sealing station, tucking at least one of the edges of said stretch film under an edge of said tray while the trayed product is being advanced to the sealing station, sealing the tucked edges under the tray in the sealing station, and applying a label to said stretch film after it has been stretched to specify the weight of the product in accordance with the weight signal stored in the memory device, after the film has been tucked under at least certain of the edges of the tray. 17. The method of claim 16 wherein the step of advancing the trayed product comprises advancing it into the pre-stretched stretch wrapping film to stretch the film about the product, and the step of tucking at least one of the edges under the tray while the trayed product is being advanced to the sealing station occurs after the trayed product has been advanced into the film. 18. A method for weighing, stretch wrapping and labelling a product in a unitary weighing and wrapping machine for use in supermarkets, retail stores, and the like, comprising: manually placing an unwrapped product to be weighed and wrapped on a scale in a weighing station that is an integral part of said machine; weighing the product while it is on said scale before it is wrapped, including generating an electrical signal corresponding to the weight of the unwrapped product; grasping the leading edge of a supply of stretch wrapping film from a film-holding member which is an integral part of said machine; pulling said film from the film supply to thereby withdraw, in a longitudinal direction, a length of stretch wrapping film therefrom; enveloping the top portion of the product in the length of stretch wrapping film after the product has been weighed; tucking said leading edge of the film under the product; advancing paid product and the length of enveloping stretch wrapping film along the path of product flow toward a sealing station, to thereby further envelop the product in the stretch wrapping film while the product is being advanced to the sealing station; severing the length of stretch wrapping film from said film supply, to produce a second edge opposite said leading edge, the severing occurring before said product is completely wrapped in said stretch film; further advancing said product so that said second edge overlies said leading edge; sealing at least certain of the tucked edges under the product in the sealing station; and applying a label to said stretch wrapping film after it has been stretched, to specify the weight of the unwrapped product in accordance with said electrical signal, after the film has been tucked under the product. 19. The method of claim 18 wherein the length of film is severed after the top portion of said product is enveloped in said film. 20. The method of claim 14 further including stretching said film in a lateral direction, transverse to said longitudinal direction. 21. The method of claim 20, wherein said film is stretched in said lateral direction before enveloping the top portion of said product in said stretch film. 22. A unitary weighing and stretching wrapping machine for use in supermarkets, retail stores, and the like, comprising: a weighing station forming an integral part of said machine, and having a weighing platform for receiving an unwrapped product; weight sensing means in said weighing station coupled to said platform to generate an electrical signal corresponding to the weight of said product independent of any stretch wrapping material; a sealing station downstream of said weighing station in the path of product flow through said machine; film supply means including a film-holding member for holding the leading edge of a supply of stretch-wrapping film, for supplying a length of said stretch wrapping film said to wrap said product as it is moved from said weighing station toward said sealing station, by enveloping the top portion of the product in said length of stretch film, advancing said product and the length of enveloping stretch wrapping film to said sealing station to thereby further envelop the product in the stretch wrapping film, and tucking said leading edge of said stretch film underneath said product, said film-holding member forming an integral part of said machine; film severing means forming an integral part of said machine for severing said length of stretch film from said film supply means before said product is completely wrapped in said stretch film; said sealing station adapted to seal the edges of said stretch film under said product; and a labelling station for producing a label to specify the weight of the unwrapped product, in accordance with said electrical signal, for application to the wrapped product after the edges of said stretch film are sealed under said product.
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