Back to results
US 5,708,339 AGranted
Bag neck gathering stop
AssigneeBurford Corporation
InventorsJimmy R. Frazier, John D. Richardson, Greg P. Coxsey
Life of this patent
Estimating the term…
Abstract
A bag neck tying device for tying a ribbon dispensed from a spool about a gathered neck. A pulley and proximity switch are mounted to prevent the completion of a tying cycle if a bag neck is not properly gathered and ready to be tied.
Claims11
Apparatus for securing a bundle of gathered material comprising:
- a frame having a slot defining a path;
- a shaft secured to said frame;
- a stop lever mounted on said shaft for rotary movement about an axis;
- an electric brake mounted between said stop lever and said frame;
- an electric circuit having a timer connected to said electric brake;
- and
- a switch in said electric circuit, said switch having an arm positioned to extend across said path, said switch, timer and electric brake being connected to momentarily lock said stop lever in a position extending across said path such that material moving along said slot is gathered adjacent said stop lever.
4 more elements
Bag neck tying apparatus comprising:
- a frame having a slot defining a path;
- a source of ribbon for dispensing a strand of ribbon having a free end and a central portion;
- a holder-shear assembly on said frame for cutting the ribbon and holding the free end of said ribbon;
- a needle assembly movably secured to said frame for engaging and positioning said central portion of said ribbon adjacent said holder-shear assembly;
- a twister assembly movably secured relative to said frame having a hook adjacent said holder-shear assembly;
- a bag stop lever mounted on said frame;
- biasing means mounted between said frame and said bag stop lever for resiliently urging said bag stop lever toward a home position extending across said path;
- an electric brake for locking said bag stop lever in said home position such that a bag neck moves into engagement with said bag stop lever for gathering material;
- a timer for energizing said electric brake to momentarily lock said bag stop in said home position and to de-energize said electric brake at the expiration of a predetermined time period;
- a plurality of electric motors, said electric motors having drive shafts connected to each of said holder-shear assemblies, needle assembly and twister assembly;
- encoders connected to each said electric motor for generating electrical signals related to the position of each said drive shaft;
- a closed loop control circuit connected to said motor and to said encoder;
- and
- a controller connected to said closed loop control circuit for controlling each of said electric motors to synchronize movement of each of said assemblies relative to each of the other assemblies.
11 more elements
Bag neck tying apparatus comprising:
- a frame;
- a source of ribbon for dispensing a strand of ribbon having a free end and a central portion;
- electrically driven holder-shear assembly for cutting the ribbon and holding the free end of said ribbon;
- a needle assembly for engaging and positioning said central portion of said ribbon adjacent said holder-shear assembly;
- a material gathering assembly for gathering material, said gathering assembly being positioned adjacent said holder-shear assembly;
- a twister assembly movably secured relative to said frame having a hook adjacent said holder-shear assembly;
- a switch having an arm positioned to be engaged by material moved by said material gathering assembly;
- a stop lever mounted on said frame;
- an electric brake connected to said switch and to said stop lever for momentarily locking said stop lever in a home position such that material is gathered adjacent said lever when said brake is energized;
- a timer connected to said switch and said brake for de-energizing said brake after expiration of a predetermined period of time;
- and
- a proximity switch adjacent said ribbon in an electrical circuit connected to said electrically driven holder-shear assembly to prevent actuation of said holder-shear assembly if said needle assembly fails to pull ribbon from said source of ribbon to wrap ribbon around gathered material adjacent said twister assembly.
9 more elements
Dependencies are inferred from the claim text.