US1139528A - Web-cutting mechanism - Google Patents

Description

L. HUFFMAN.

WEB CUTTING MECHANISM. APPLICATION FILED JUNE 30,.I9H.

latenmi May 18, 1915.

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WITNESSES:

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L. HUFFMAN.

WEB CUTTING MECHANISM. APPLICATION FILED JUNE 30. I911.

WI TNESSES 0 IN VEN TOR. m 3 By DZZQQ, W 7% 5W A TTORNE Y.

member 12 to the horizontal is chaned to correspond to the chances in the position of the die member 4, suc change tending to maintain the die member substantially normal to the her l. As, however, proportioned as shown, the die member t is traveling around the shaft 12 on a circle of lesser radius than that of a circle drawn through its center from the center of the drum 3 l find that for similar arcs oi travel the two die members do not move to and from the horizontal corresponding distances in equal periods of time. Hence means must be provided to vary the rate of travel of the die member 11 during such time as the two die members are in cooperative relationship. It is for this reason that the die member carriers 1% are loose on the shaft 12 as thus the die member carriers may be rocked independently oi the shaft to give the desired variations in the rate of travel of the die member 11 to enable it toproperly maintain its cooperative relationship with the die member t.

A variety of mechanisms might be employed for the purpose of rocking the die member carriers M. I illustrate, however, one which answers the purpose satisfactorily. Arms 18 are secured to the shaft 12 and in these arms is journaled a rock shaft 19. This rock shaft carries a segmental gear 20 meshing with a gear segment 21 formed on one of the die member carriers 1%. Secured to the rock shaft 19 is a rock arm 22 which is provided with a projection 23 engaging in the cam groove 24 formed in the stationary cam disk 25. This cam will be so proportioned as to cause whatever variation may be necessary in the rate of travel of the die member 11 about the shaft 12 while the die members are in cooperative position.

The connection between the pinion l6 and the trunnion l5, hereinbefore referred to, is preferably arranged as follows: A pin 26 secured to the trunion 15 fits within a rerose 27 in the pinion thus allowing the latter a limited movement of rotation relative to the trunion. A coilspring 28 has one end fitted into a hole in the pinion and its other end fitted in a hole in a disk 29 loose on the trunnion. A disk 30 is secured to the spindle and has a slot 31 formed therein through which passes the clamping screw 32 screwed into the disk 29. It is evident that by means of the clamping screw that the disk 29 may be adjusted relative to the disk 30 to regulate the tension of the coil spring 28. This coil spring tends to yieldingly press the die member 11 toward the die member 4 when they are in 006perative position to cause the cutting edges to hug one another sufiiciently closely to prow en the parts are duce a clean cut.

To insure the die members coiiperating acpath of the ed e of the die memtatable on one axis;

t eatres curately a finger 33 is provided on the die member t which engages over the die member 11, as shown particularly in Figs. 2 and l.

Whatil claim as my invention is a 1. The combination of a die-member roand movable in a closed axis; a rotary member center ofrotation and with which the die member is adapted to cooperate as it moves in said closed path; means for causing'the die-member to rotate on its axis to maintain it substantially normal to the path of the coiiperating member while the two members are in cooperative position; and means for causing the die member to move in its closed path at a Speed greater than the speed of the cotiperating member to compensate for the rotary movement of said die member on its axis.

2. The combination of a shaft; die-member carriers mounted thereon; a die-member journaled in said carriers; ber fixed relative to its-center of rotation and with which the die-member is adapted tocoiiperate as it is carried around said shaft; means for causing the die-member to rotate on its axis to maintain normal to the path of the cotiperating meinber while the two members are in coiiperpath about a second fixed relative to its ative position; and means for causing the die member to move in its closed path at a speed greater than the speed or the cooperating member to compensate for the rotary movement of said die member on its axis.

3. The combination of a shaft; die-member carriers mounted thereon; a die-member journaled in said carriers; gearing whereby the die-member is carried about said shaft and simultaneously rotated on its axis thrice as it is carried about said shaft twice; and a rotary member with which the die-memher is adapted'to coiiperate.

4. The combination of a shaft; die-member carriers mounted thereon; a die-member journaled in said carriers; gearing whereby the die-member is carried about said shaft and simultaneously rotated on its axis thrice as it is carried about said shaft twice; and a rotary member with which the die-member is adapted to cotiperate, and means for varying the rate of travel of the die-member relative to the shaft to maintain the diemember substantially normal to the path of the cooperating member while the two members are in coiiperative position.

5. The combination of a shaft; die-member carriers mounted thereon; a die-member journaled in said carriers; gearing whereby said die-member is. carried about said shaft and simultaneously rotated on its axis thrice as it is carried about said shaft twice; and a rotary member geared to said shaft with which the die-member is adapted to 005pcrate.

it substantially.

meaaaa 6. The combination of a shaft; die-member carriers mounted loose thereon; a diememberjournaled in said carriers; gearing connected with the shaft and die-member whereby the die-member rotates about said shaft and also rotates on its axis as it'is carried about said shaft; a rotary member fixed relative to its center of rotation and with which the die-member is adapted to cooperate; means for rocking said die-member carriers on the shaft to maintain the diemember substantially normal to the path p of the cooperating member while the two members are in cooperative position; and the gearing being arranged to cause the die member to niove in its closed path at a speed greater than the speed of the cooperating member to compensate for the rotary movement of said die member onits axis.

7. The combination of a shaft; die-member carriers'mounted thereon; a die-member journaled in said carriers eccentric to the shaft; gearing whereby the die-member is carried about said shaft and simultaneously rotated on its axis; a yielding ing connection between said die-member and its driving gear; and a rotary member with which the die-member is adapted to cooperate.

immovable to maintain a constant angle driv 8. The combination of two die-members adapted to cooperate rotatable about paral lel axes and one also rotatable about a third axis whereby it may be maintained at a constant angle to the other member while they are in cooperative position; and means whereby the second die member moves about its first axis at a greater speed than the first die member about its axis to compensate for the movement of the second die member about said third axis;

9. The combination of a rotary die-member; and'a die-member movable at a greater rate of speed to cooperate therewith, and also movable to maintain a constant angle relative to the other member while they are in cooperative position.

10. The combination of a die-member; and a die-member movable at a greater rate of speed to cooperate therewith, and allso re ative to the other member while they are in cooperative position.

ioronto, Ont. this 27th day of June 1911.

LOUIS HUFFMAN.

Signed in the presence of.

E. P HALL D. S: 'llovnra.

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