US2002017077A1PendingUtilityA1

Closing device for the closing tools of a bag-packing machine

35
Individually held — no corporate assignee on recordPriority: Jun 30, 2000Filed: Jun 29, 2001Published: Feb 14, 2002
Est. expiryJun 30, 2020(expired)· nominal 20-yr term from priority
Inventors:Wolfgang Klinkel
B65B 51/303
35
PatentIndex Score
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Cited by
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Claims

Abstract

The invention relates to a closing device for the closing tools of a bag-packing machine. In known machines of this type, the closing tools are actuated by mechanical means such as lever systems, or pneumatic or hydraulic systems. These drive systems do not allow the machine to achieve high yields, since the mass of the components that must be moved back and forth is too great. The goal of the invention is to allow the machine to achieve a greater bag production and an enhanced precision in the movements executed by the tools, while also reaching a greater and higher closing force, among other things. This is accomplished in that the guide elements ( 18, 19, 20, 21; 34 ) of the tools ( 11, 12 ) take the form of toothed racks, while at least one toothed rack is driven by a motorized pinion ( 22, 23; 26, 27, 28, 29; 36 ). The motors employed will preferably be digital servomotors.

Claims

exact text as granted — not AI-modified
What is claimed:  
     
         1 . Closing device for the closing tools of a bag-packing machine with two tools, at least one of which is heated, which tools are moved towards and away from each other in an opposite and synchronized fashion and are guided within at least two guide elements, characterized in that the guide elements ( 18 ,  19 ,  20 ,  21 ;  34 ) of the tools ( 11 ,  12 ) take the form of toothed racks and at least one toothed rack engages with a motorized pinion ( 22 ,  23 ;  26 ,  27 ,  28 ,  29 ;  36 ) to provide the opposite and synchronized movement.  
     
     
         2 . Closing device according to  claim 1 , characterized in that each tool ( 11  or  12 ) is guided by two guide elements ( 18 ,  19  or  20 ,  21 ) which lie on either side and take the form of toothed racks and each guide element is driven by a motorized pinion ( 26 ,  27 ,  28 ,  29 ).  
     
     
         3 . Closing device according to  claim 1 , characterized in that each tool ( 11 ,  12 ) is guided by means of two guide elements ( 18 ,  19  or  20 ,  21 ) which lie on either side and take the form of toothed racks, and the two toothed racks ( 18 ,  20 ;  19 ,  21 ) of the same side of the two tools ( 11 ,  12 ) are driven by means of a single motorized pinion ( 21 ;  23 ).  
     
     
         4 . Closing device according to  claim 1 , characterized in that one ( 12 ) of the two tools ( 11 ,  12 ) is guided by means of three guide elements ( 20 ,  21 ;  34 ) that take the form of toothed racks, while two guide elements ( 20 ,  21 ) lie on either side of the tool ( 12 ), while the third guide element ( 34 ) lies on the center plane of the tool ( 12 ), and the second tool ( 11 ) is guided by means of guide elements ( 18 ,  19 ) that take the form of toothed racks, and the third guide ( 34 ) of the first tool ( 12 ) is driven by a motorized pinion ( 36 ), while the two guide elements ( 18 ,  20 ;  19 ,  21 ) lying on either side of the tools and belonging in either case to one of the two tools ( 11 ,  12 ), are kinematically coupled as toothed racks by means of a pinion ( 22 ;  23 ).  
     
     
         5 . Closing device according to  claim 1 , characterized in that each motorized pinion ( 22 ,  23 ;  26 ,  27 ,  28 ,  29 ) is driven by a digital servomotor ( 24 ,  25 ;  30 ,  31 ,  32 ,  33 ;  36 ).  
     
     
         6 . Closing device according to  claim 2 , characterized in that the motors ( 24 ,  25 ;  30 ,  31 ,  32 ;  33 ;  36 ) that drive the toothed racks are coupled with each other and with the corresponding control system by means of fiber-optic cables for real-time operation.  
     
     
         7 . Closing device according to  claim 5 , characterized in that the digital servomotor ( 24 ,  25 ;  30 ,  31 ,  32 ,  33 ;  36 ) is set for adjusting the movement profile of the corresponding tool ( 11 ,  12 ).  
     
     
         8 . Closing device according to claims  5 , characterized in that the digital servomotor ( 24 ,  25 ;  30 ,  31 ,  32 ,  33 ;  36 ), or the digital servomotors, can be modified in order to adjust the closing force of the tool, which is programmed by means of the current.  
     
     
         9 . Closing device according to  claim 1 , characterized in that the motorized pinion has a diameter of less than 30 mm.

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