Apparatus with facing bell members for modified-atmosphere packaging of products contained in trays
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65B-031/02
B65B-007/16
출원번호
US-0131013
(2012-07-03)
등록번호
US-9902509
(2018-02-27)
우선권정보
IT-BO2011A0403 (2011-07-07)
국제출원번호
PCT/EP2012/062935
(2012-07-03)
§371/§102 date
20140328
(20140328)
국제공개번호
WO2013/004699
(2013-01-10)
발명자
/ 주소
Schiavina, Andrea
Vaccari, Massimiliano
출원인 / 주소
GRUPPO FABBRI VIGNOLA S.p.A.
대리인 / 주소
Stetina Brunda Garred and Brucker
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
Apparatus with facing bell members for modified-atmosphere packaging of products contained in trays, comprising at least three circuits: a first circuit and a second circuit (24, 25) which are connected to the main chamber (P) enclosing the internal volume of the trays and open out in different posi
Apparatus with facing bell members for modified-atmosphere packaging of products contained in trays, comprising at least three circuits: a first circuit and a second circuit (24, 25) which are connected to the main chamber (P) enclosing the internal volume of the trays and open out in different positions (23, 23′) of this volume and a third circuit (17) connected to the internal chambers (2, 9) of the bell members (1, 8) and these circuits are intercepted by respective valve means (28, 128, 18, 118) so as to be initially all connected to the vacuum means (21, 121) and then the said first circuit (24) is closed, while the said second circuit (25) is connected to the means (26) for introducing the service gases which, entering into the tray, force the remaining air out so as to occupy a small buffer formed by the said second closed circuit (24, 28). The third circuit (17) is connected via associated valve means (118) to means (22) for gradual pressurization, using also atmospheric air, in order to balance the internal pressurization of the tray with the service gases.
대표청구항▼
1. An apparatus with facing bell members for modified-atmosphere packaging of products contained in at least one tray, the at least one tray having a top flange, the top flange including a first side and a second side, which is opposite the first side, the apparatus comprising: a top bell member whi
1. An apparatus with facing bell members for modified-atmosphere packaging of products contained in at least one tray, the at least one tray having a top flange, the top flange including a first side and a second side, which is opposite the first side, the apparatus comprising: a top bell member which is open downwards and contains sealing means and means for cutting; a barrier film closing the at least one tray;a bottom bell member which is open upwards, with a chamber and with at least one seat for receiving at least one tray;valves and ducts configured to extract the air from the at least one tray and introduce, into the at least one tray, service gases for conserving the product contained inside the tray, before the apparatus tightly closes and welds the barrier film on the edge of the tray and subsequently cuts the portion of barrier film welded to the tray around the portion's perimeter;edges and annular seals mounted on the bell members, the edges and annular seals positioning a taut section of barrier film between the bell members and above the trays, and the edges and annular seals, when the bell members close, ensure the bell members form inside them a main chamber which is defined at the top by the barrier film covering the tray, at the bottom by the tray with the product and on the sides by a combination of an annular mouth of the bottom bell, and the sealing means of the top bell in contact, which surrounds and connects the perimeter of the barrier film to the perimeter of the top edge of the tray; andthe annular mouth being provided with holes or eyelets, or holes and eyelets in combination, which are suitably distributed and positioned on the outside of the tray perimeter and communicate with the main chamber, characterized in that;wherein, when the two bell members are closed, two volumes which do not directly communicate with each other are formed inside said bell members, including: a first volume formed by the main chamber with the tray and with the barrier film; anda second volume formed by the internal intercommunicating chambers of the two bell members;wherein the bell members have a first position spaced apart from one another, and a second position where the top bell member and bottom bell member close between them the edge of the tray and the barrier film;wherein said holes open out substantially along the first side and the second side of the top flange, the holes on the first side being connected to a first circuit located in the bottom bell member, and the holes on the second side being connected to a second circuit also located inside the bottom bell member. 2. Apparatus according to claim 1, wherein internal chambers of the bell members are connected together and to at least one third circuit, valves and a controller configured to, via said first and second circuit connected to the main chamber and via said third circuit connected to the internal chambers of the two bell members, produce MAP-type packages without the formation of high vacuums and with a limited use of service gases. 3. Apparatus according to claim 2, wherein the first and second circuits are connected via respective ducts to corresponding valves coupled respectively to suction means and to a source for supplying the service gases for internal processing of the trays, while the third circuit may be connected via corresponding valves to the suction means or to pressurisation means also of the ambient air type, respectively, there being provided means for ensuring that, during formation of the vacuum, the first circuit and the third circuit are connected via the respective valves to the suction means which operate in a first phase of a gas removal and addition cycle, the first phase including the removal of less than all of the air in the internal volume of the tray, the second header is connected to the means for supplying the service gases in a second phase where service gas enters on one side of the tray through the second header pushing the remaining air inside the tray out of the holes on an opposite side of the same tray, through the first circuit which is then closed by the respective valve so as to form a blind buffer circuit which stores the washing air, all of which so as to perform at the same time washing and saturation of the internal volume of the tray and a third phase where only the second circuit is operable to add service gas to fill the remaining internal volume of the tray, thus the air in the internal volume of the tray is replaced with service gas without the formation of vortices and backflows and therefore in a very rapid and reliable manner. 4. Apparatus according to claim 2, characterized in that, when the trays to be packaged are arranged alongside each other in parallel rows, the first circuit is located longitudinally between two adjacent rows of trays and is connected to the rows of said holes positioned laterally and on the inner sides of both rows of trays, while the second circuit has longitudinal branches connected to the rows of outer holes which are positioned laterally and on the outer sides of the two rows of trays and which via branched lines are connected together and to the mouth for connection to the valve means. 5. Apparatus according to claim 1, wherein the volumetric dimensions of the first circuit and the associated circuit for connection to an associated intercepting valve, when the associated intercepting valve is closed, are correlated to the volume of the main chamber of the packages being formed between the two opposite bell members and the sequential time intervals of the various steps of the working cycle of the apparatus are such as to ensure that, during the step for washing and saturating the main chamber with the gases, a blind circuit connected at the outlet of said main chamber stores substantially only the remaining air inside the internal volume of the trays being saturated with the service gases, with optionally only a small part of the front flow of the gases, with all the advantages of simplification, a faster process and lower costs resulting from this condition.
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Vaccari, Massimiliano, Machine for packaging products in rigid or semirigid trays sealed across the top by a thermoplastic film, particularly for producing packs in a modified atmosphere.
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