Tangent stream thermal shrinking device

Abstract

A tangent stream thermal shrinking device includes a chassis, along two side of which two position adjusting mechanisms are arranged. Each position adjusting mechanism has at least one mounting section, of which the position is adjustable. Mounting seats that are respectively mounted to the mounting sections of the position adjusting mechanisms each form at least one track slot. Hot air dispensers are respectively coupled to the track slots of the mounting seats and are thus angular position adjustable along the track slots to discharge hot air streams along paths that are tangential to a circumference of an article outside which a heat shrink film wraps. A hot air supply device supplies hot air to the hot air dispensers to have the heat shrink film fast and uniformly heated and shrunk for packaging.

What is claimed is: 
     
         1 . A tangent stream thermal shrinking device, comprising:
 a chassis, which has an interior space of which two opposite portions respectively form retention zones, between which a heat sealing packaged article is allowed to pass;   at least two position adjusting mechanisms, which are respectively arranged at the retention zones at the two side portions of the interior of the chassis, each of the position adjusting mechanisms comprising a mounting section, the position adjusting mechanism being operable to adjust horizontal or vertical position of the mounting section;   a plurality of mounting seats, which is mounted to the mounting section of each of the position adjusting mechanisms, each of the mounting seats forming at least one track slot;   a plurality of hot air dispensers, which is respectively coupled to the track slots of the mounting seats to allow each of the hot air dispensers to be movable among various angles and positions with respect to the mounting seat, so that the hot air dispensers are selectively set to discharge hot air streams along paths that are tangential to a circumference of a heat sealing packaged articles; and   at least one hot air supply device, which is connected to each of the hot air dispensers to supply hot air to the hot air dispenser.   
     
     
         2 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein the chassis has an exterior that is coupled to an enclosure in such a way that the enclosure has front and rear ends each forming an opening. 
     
     
         3 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein each of the position adjusting mechanisms comprises:
 a bracket, which has upper and lower ends to which a first fixing bar and a second fixing bar are respectively fixed;   a horizontal movement device, which is mounted to the first fixing bar of the bracket;   a vertical movement device, which is mounted to the second fixing bar of the bracket so that the vertical movement device is operable to selectively adjust a vertical position of the bracket; and   a mounting section, which has an underside coupled to the horizontal movement device so that the horizontal movement device is operable to selectively adjust a horizontal position of the mounting section, the vertical movement device being also adjusting operable to adjust a vertical position of the mounting section by selectively adjusting the vertical position of the bracket.   
     
     
         4 . The tangent stream thermal shrinking device as claimed in  claim 3 , wherein the horizontal movement device comprises:
 a stationary bottom board, which is fixed to the first fixing bar of the bracket;   a front board, which forms a threaded hole and a plurality of through holes;   a screw and a plurality of rails, each having an end extending through threaded hole and through holes of the front board to rotatably couple to the stationary bottom board;   a first movable block, which forms a threaded hole threadingly mating the screw;   a plurality of second movable blocks, which are respectively and movably mounted to the rails; and   a rotary hand wheel, which is coupled to an end of the screw close to the front board for operation of rotation in clockwise or counterclockwise direction.   
     
     
         5 . The tangent stream thermal shrinking device as claimed in  claim 3 , wherein the vertical movement device comprises:
 a stationary bottom board;   a front board, which forms a threaded hole and a plurality of through holes;   a screw and a plurality of rails, each having an end extending through threaded hole and through holes of the front board to rotatably coupled to the stationary bottom board;   a third movable block, which forms a threaded hole threadingly mating the screw;   a plurality of fourth movable blocks, which are respectively and slidably mounted to the rails, the third movable block and the fourth movable blocks being fixed to the second fixing bar of the bracket; and   a rotary hand wheel, which is coupled to an end of the screw close to the front board for operation of rotation in clockwise or counterclockwise direction.   
     
     
         6 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein the track slots of the mounting seats are of a curved configuration. 
     
     
         7 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein each of the hot air dispensers forms at least one threaded hole, which is in alignment with the track slot of the respective mounting seat to be coupled thereto by a threaded fastener set. 
     
     
         8 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein each of the hot air dispensers has an end forming an air ejection nozzle. 
     
     
         9 . The tangent stream thermal shrinking device as claimed in  claim 8 , wherein the air ejection nozzle is of a configuration of flattened horn. 
     
     
         10 . The tangent stream thermal shrinking device as claimed in  claim 1 , wherein the hot air supply device is arranged at a bottom of the chassis.