Chamfer forming head for paper roll

Details Chamfer forming head for paper roll Chamfer forming head for paper roll

1999-07-30

2001-05-08

Tsai, Henry (Department: 3722)

Turning

Portable lathe for pipe turning

C082S161000, C407S036000

Reexamination Certificate

active

06227083

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a forming head, more particularly, to a chamfer forming head for paper roll used for winding threads thereon. The forming head is formed by cutting without scraps or burrs. On the other hand, ventilating holes are provided such that the paper roll is prevented from burning.
DESCRIPTION OF PRIOR ART
To the paper roll used for winding threads thereon, a chamfering process will be performed at one end to remove the hooks which may damage the threads wound thereon. Normally, a chamfering tool is applied to remove the sharp edge with suitable machine, such as a lathe. However, this cutting process having scraps is not suitable for paper roll since it has a low density. Besides, the paper roll contains many a fibrous material. Even the sharp edge at one end is chamfered, burrs and projected fibers will still hook the thread and damage the threads.
U.S. Pat. No. 5,351,587 teaches the use of a pair of teeth 43 to process one end of a nipple 30. U.S. Pat. No. 3,999,452 teaches the use of two pairs of cutters 31 and 32 to process one end of a tube. U.S. Pat. No. 2,218,147 teaches the use of cutting tools 8 to process one end of a pipe
13
. Because these teachings achieve chamfering by direct cutting, they are not suitable for processing paper roll.
Another existing working process is exerting pressure onto the area of the paper roll such that a chamfer can be attained. However, even this performing process can readily forming a chamfer without scraps or burrs, another negative effect is attained since the pressure exerted at a certain point will generate a deformation on the paper roll. As the pressure exerted onto the paper roll increases from a single point to a circle, the frictional forces increases accordingly such that the rotation of the paper roll will be negatively influenced. In a worse condition, the chamfering area will be burned by the heat resulted from frictional force.
SUMMARY OF THE INVENTION
It is the objective of this invention to provide a chamfer forming head wherein the problems encountered by the existing techniques can be ultimately solved.
It is still the objective of this invention wherein the chamfering process is performed without scraps, low frictional force and the pressure exerted is uniformly distributed.


REFERENCES:
patent: 2218147 (1940-10-01), Greenwood
patent: 3595107 (1971-07-01), Dackow
patent: 3603182 (1971-09-01), Jackman
patent: 3636803 (1972-01-01), Miller
patent: 3999452 (1976-12-01), Larsen
patent: 5351587 (1994-10-01), Griffin

Affiliated with

Also associated with

Rating

Chamfer forming head for paper roll does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chamfer forming head for paper roll, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chamfer forming head for paper roll will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2570877