EP1182137A1 - Improvements to machines wrapping products with a stretch film - Google Patents

Improvements to machines wrapping products with a stretch film Download PDF

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Publication number
EP1182137A1
EP1182137A1 EP99962280A EP99962280A EP1182137A1 EP 1182137 A1 EP1182137 A1 EP 1182137A1 EP 99962280 A EP99962280 A EP 99962280A EP 99962280 A EP99962280 A EP 99962280A EP 1182137 A1 EP1182137 A1 EP 1182137A1
Authority
EP
European Patent Office
Prior art keywords
film
lateral
pins
cylinders
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99962280A
Other languages
German (de)
English (en)
French (fr)
Inventor
Josu Errasti Iriarte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ulma CyE S Coop
Original Assignee
Ulma CyE S Coop
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ulma CyE S Coop filed Critical Ulma CyE S Coop
Publication of EP1182137A1 publication Critical patent/EP1182137A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/54—Wrapping by causing the wrapper to embrace one end and all sides of the contents, and closing the wrapper onto the opposite end by forming regular or irregular pleats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages

Definitions

  • the purpose of this invention consists in introducing the necessary devices and mechanisms in the wrapping machine to provide an automatic wrapping of trays with articles whose maximum and minimum dimensions comprise all the range of products generally used in the market and likewise obtain a greater use of the film, or in other words, achieve the wrap-up of an ample range of trays with the narrowest film reel.
  • the abovementioned devices allow for the automatic use of two film reels of equal or different width, both cross-wise and in a longitudinal manner, according to the type of reel used and the positioning and operation of the folding devices according to the dimensions of the product to be wrapped.
  • the system is controlled by a programmable microprocessor within the machine which decides automatically which of the two reels is to be used, as well as the position of the lateral fastening pins which stretch the film, and the position of the lateral folding devices according to the dimensions of the product required.
  • Extensible film wrap machines used for wrapping trays with products have been known in the art for some time, in these, the trays access the system by means of a loading station which places them on an elevator, which conveys the trays vertically until the film sheet intended for wrapping said product is reached, said sheet having been supplied by a film reel which pays out the same by means of an extraction pin.
  • These machines are provided with a central folding device which transfers the movement to the respective lateral folding devices in order to fold the film under the tray, and with a conveyer system in order to drive the tray to the end section of the machine where the final folding of the tray takes place. Finally, the wrapped tray is moved to a heated tunnel to shrink the film.
  • the extraction pin supplying the film is provided with a variable movement in order to dispense an amount of film in proportion to the length of the product for wrapping, and in each case only the required amount will be dispensed, thus ensuring an optimal folding.
  • This pin likewise conducts a stretching of the film proportionate to the degree of flexibility and tension of the blade required.
  • the extraction pin of the film is capable of pinching the central and lateral areas of the film allowing for a gradual release of the film, first in the lateral sections to facilitate lateral folding, that is, to release the outer surface of the film and allow the folding devices to operate under the product while the central area remains gripped until the final or exit folding is carried out.
  • the wrapping machine described in this Patent also includes lateral pins which may travel in order to carry out a cross-wise pre-stretching of the film which improves the film's elasticity when the wrapping takes place.
  • This pre-stretching is set at a specific value in order to achieve the same degree of stretching, regardless of the width of the film used.
  • the movement of the central folding device is separated from the lateral folding devices, so that each movement may be controlled according to the article wrapped.
  • these lateral pins are mounted on crosswise slides which are operated by means of a swinging motion provided by a cog fitted in a connecting rod which acts on the first stretcher that tilts a side lever to which the respective pins are linked to by means of their corresponding stretchers, with the specialty that the first stretcher is coupled to a pneumatic cylinder which permits the adjustment of its effective length at will and therefore controls the minimum distance between the pins allowing for the lateral pull action on the film.
  • the lateral folding devices which are responsible for placing the film under the tray or article in question, may be positioned at a greater distance between them as required if a greater or lesser penetration under the tray is desired, according to the size of the same, varying the size of the lateral folds of the film and thus the width obtained in the final section of the same which provides the final folding, and to that end, the folders are likewise driven by a cog, which by means of a first arm, a stretcher operated by a pneumatic cylinder, a second arm and a pneumatic cylinder, drive the folding devices in question, so that depending on whether these cylinders are active or inactive, the opening position of the lateral folding devices will be modified pursuant to the operating program provided by the microprocessor of the machine.
  • the support (2) must be capable of traveling vertically for an equal distance to that existing between the combs(1-1'), wherefore said support (2) is driven by two pneumatic cylinders (10) located at the end-points of the same, and in its turn, a couple of pneumatic cylinders (11) allow the upper comb to open and close (1), while another cylinder (12) opens and closes the lower cylinder (1'), and to achieve this, the rods fitted in the pneumatic cylinders (11), mounted on the support (2), act on rivets (13) coupled to the end tilting brackets (3) of the upper comb (1), whereas the rod of the intermediate cylinder (12) operates a cross bar (14) which in its turn drives the end brackets (3') tilting the lower comb (1').
  • the machine control point may be programmed according to the data relayed in order to activate the abovementioned cylinders (10) and change the position of the comb so that the extraction pin (9) pulls the selected film up to a length which has been likewise programmed according to the dimensions of the product to be wrapped.
  • the lateral pins (15) must conduct a lateral folding of the same and likewise according to the invention, these pins (11) may vary their position to provide a greater or lesser stretching of the film pursuant to the different reel widths (8-8') foreseen.
  • the abovementioned pins (15) are mounted on cross slides (16) whereby they may move inwards or outwards, and these pins (15) are operated by means of their respective stretchers (17-17') by a side lever (18) to which a third stretcher is coupled (19) which in its turn receives the motion from a cog (20) fitted in a connecting rod (21) so that said cog (20) provides a swinging motion to the pins (15), from a position in which there is the least distance between each other, and these close on the marginal borders of the film (7), to the opposite situation of maximum distance, which corresponds to the stretching of the film in question, but with the specialty that these limit positions are adjustable, as the stretcher (19) is powered by pneumatic cylinder (22) provided with an extension (23) whereby the effective length of the stretcher may be regulated and therefore the position of the side lever (18) which gives rise to the distancing motion of the pins (15) as shown in Figures 4 and 5, so that in the position shown in Figure 4, the lateral pins (15
  • control board may be programmed according to the dimensions of the article to be wrapped and the mechanisms of the folding system will then be conveniently operated.
  • control panel of the machine may be programmed according to the dimensions of the article, in order to action said cylinders (29) and (31), in order to achieve four different opening positions for the lateral pins, as shown in Figure 8, adjusted to the different sizes of the tray (25).
  • the constant movement of the folding devices in order to fold the film laterally in each cycle will be performed equally from any of the opening positions of the abovementioned transversal folding devices (24) shown in the four sequences of Figure 8.
  • the narrowest folding position which is shown in Figure 8 A, achieved when the two cylinders (29) and (31) are inactive, it may be exactly adjusted to the tray or article (25) with smaller dimensions, following an adjustment of the stretcher (29), which generates a position of the lateral stretchers (24) in which the distance between them is exactly that required for the lateral film to fold beneath the tray (25) and create a final fold which does not exceed the dimensions of the tray in question.
  • the widest position of the lateral folding devices (24) is achieved when the two cylinders, (29) and (31), are operated, which allows for the wrapping of large-sized trays (25), as the distance between said folding devices (24) generates a final open fold which fully covers the underside of the tray (25) as shown in figure 8D.
  • control panel may action only a cylinder (31), thus achieving an operating position which is specially apt for middle-sized trays as that shown in Figure 8B, or if only the pneumatic cylinder is operated (30), then an intermediate position for the lateral folding devices is achieved (24), which is wider than in the preceding case due to the different run of the cylinders, and suited for trays (25) shown in Figure 8C.
EP99962280A 1999-12-31 1999-12-31 Improvements to machines wrapping products with a stretch film Withdrawn EP1182137A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES1999/000416 WO2001049567A1 (es) 1999-12-31 1999-12-31 Mejoras introducidas en maquinas envolvedoras de productos con film extensible

Publications (1)

Publication Number Publication Date
EP1182137A1 true EP1182137A1 (en) 2002-02-27

Family

ID=8307509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99962280A Withdrawn EP1182137A1 (en) 1999-12-31 1999-12-31 Improvements to machines wrapping products with a stretch film

Country Status (4)

Country Link
EP (1) EP1182137A1 (es)
CA (1) CA2362397A1 (es)
MX (1) MXPA01008792A (es)
WO (1) WO2001049567A1 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012176778A (ja) * 2011-02-25 2012-09-13 Ishida Co Ltd ストレッチ包装装置
CN110216867A (zh) * 2018-03-02 2019-09-10 丰田自动车株式会社 薄膜输送装置、薄膜输送方法以及薄膜粘贴装置
CN110733707A (zh) * 2019-11-06 2020-01-31 甄宗平 一种包装袋侧边封口机构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4501006A (en) * 1980-08-14 1985-02-19 Michael Korenberg Hot-box signalling devices
US4674269A (en) * 1984-08-31 1987-06-23 Teraoka Seiko Co., Limited Wrapping machine
US5115620A (en) * 1989-09-18 1992-05-26 Fuji Pack System Ltd. Wrapping machine
US5144787A (en) * 1991-01-14 1992-09-08 Premark Feg Corporation Package wrapping method and machine
ES1017827Y (es) * 1991-06-11 1992-07-01 Ulma, S.Coop. Ltda. Dispositivo de sujecion lateral de film en maquinas envolvedoras.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0149567A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012176778A (ja) * 2011-02-25 2012-09-13 Ishida Co Ltd ストレッチ包装装置
CN110216867A (zh) * 2018-03-02 2019-09-10 丰田自动车株式会社 薄膜输送装置、薄膜输送方法以及薄膜粘贴装置
JP2019151459A (ja) * 2018-03-02 2019-09-12 トヨタ自動車株式会社 フィルム搬送装置、フィルム搬送方法、及びフィルム貼付け装置
CN110216867B (zh) * 2018-03-02 2021-11-09 丰田自动车株式会社 薄膜输送装置、薄膜输送方法以及薄膜粘贴装置
CN110733707A (zh) * 2019-11-06 2020-01-31 甄宗平 一种包装袋侧边封口机构

Also Published As

Publication number Publication date
WO2001049567A1 (es) 2001-07-12
MXPA01008792A (es) 2003-07-14
CA2362397A1 (en) 2001-07-12

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