Method for manufacturing a packaged food product

Abstract

A process for producing a food enclosed in sealed containers which is free from a trouble during production that water spills from the containers or a perforating jig falls into the containers and in which a heat treatment can be conducted without causing quality unevenness. A food ( 1 ) is placed in containers ( 2 ). The containers ( 2 ) filled with the food ( 1 ) are sealed with a primary film ( 4 ) having a through-hole ( 3 ) to obtain a sealed-container-packed food (A). This sealed-container-packed food (A) is disposed in a heating vessel ( 7 ) having a steam inlet part ( 5 ) and a steam discharge part ( 6 ). Steam is introduced through the steam inlet part ( 5 ) into the heating vessel ( 7 ) to heat the sealed-container-packed food (A) while discharging the steam through the steam discharge part ( 6 ). Thereafter, a secondary film ( 8 ) is bonded to each container through the primary film ( 4 ) so as to cover the through-hole ( 3 ).

1 . A method for manufacturing a packaged food product, characterized in comprising:
 placing a food product in a container, sealing the container holding the food product using a primary film having a communicating hole to obtain a packaged food product, placing the packaged food product inside a heating vessel provided with a steam inflow part and a steam discharge part, and causing steam to flow into the heating vessel from said steam inflow part; and   fixing a secondary film so as to cover said communicating hole from above said primary film after heat-treating the packaged food product while discharging the steam from said steam discharge part.   
   
   
       2 . The method for manufacturing a packaged food product according to  claim 1 , characterized in that a heating temperature inside said heating vessel is controlled by adjusting an inflow quantity of steam from said steam inflow part during said heat treatment. 
   
   
       3 . The method for manufacturing a packaged food product according to  claim 1 , characterized in that said packaged food product covered by a cover body is placed in said heating vessel, steam is allowed to flow in from said steam inflow part towards the cover body, and heat treatment is performed. 
   
   
       4 . The method for manufacturing a packaged food product according to  claim 2 , characterized in that said packaged food product covered by a cover body is placed in said heating vessel, steam is allowed to flow in from said steam inflow part towards the cover body, and heat treatment is performed. 
   
   
       5 . The method for manufacturing a packaged food product according to any of  claims 3  and  4 , characterized in that said packaged food product is covered by said cover body having a sloped roof. 
   
   
       6 . The method for manufacturing a packaged food product according to any of  claims 1  through  4 , characterized in that a U-shaped, V-shaped, or X-shaped cut is formed in said primary film, and the cut is used as said communicating hole. 
   
   
       7 . The method for manufacturing a packaged food product according to  claim 5 , characterized in that a U-shaped, V-shaped, or X-shaped cut is formed in said primary film, and the cut is used as said communicating hole. 
   
   
       8 . The method for manufacturing a packaged food product according to  claim 6 , characterized in that at the same time as said cut is formed in the primary film by a cutting tool in said communicating hole, the edge of the cut is oriented upward, or the edge of the cut is oriented upward after the cut is formed. 
   
   
       9 . The method for manufacturing a packaged food product according to  claim 7 , characterized in that at the same time as said cut is formed in the primary film by a cutting tool in said communicating hole, the edge of the cut is oriented upward, or the edge of the cut is oriented upward after the cut is formed. 
   
   
       10 . The method for manufacturing a packaged food product according to any of  claims 1  through  4 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained. 
   
   
       11 . The method for manufacturing a packaged food product according to  claim 5 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained. 
   
   
       12 . The method for manufacturing a packaged food product according to  claim 6 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained. 
   
   
       13 . The method for manufacturing a packaged food product according to  claim 7 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained. 
   
   
       14 . The method for manufacturing a packaged food product according to  claim 8 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained. 
   
   
       15 . The method for manufacturing a packaged food product according to  claim 9 , characterized in that a food product subjected to high-pressure treatment at 1000 atmospheres or higher is placed in a container, the container holding the food product is sealed by a primary film that has a communicating hole, and a packaged food product is obtained.