US1513106A - Feeding mechanism for sheet material - Google Patents

Description

Get. 28 1924- Filed May 15, 1922. 2 Shams-Sheet l awuwvlim Homca. F Gamnmattomaqs.

H. F. GRUMAN FEEDING MECHANISM FOR SHEET MATERIAL Get 28 1924.

Filed May 15, 1922 2 Sheets-Sheet 2 ECW Swowwtov mace, F. QRUMRN.

Momma- To all whom it may concern:

raema oer; 2a, 1924.

PATENT OFFICE.

HORACE F. GRUMAN, OIB JACKSON, MICHIGAN.

mmnma mncmmsm ron SHEET ma'rnamn Application filed m 15, 1922.- Serial No. 561,188-

Be it known that 1, Homes F. GRUMAN, a citizen of the United States of America, re-

sidin at Jackson, in the county'of Jackson and tate of Michigan, have invented certain new and useful Improvements in Feeding Mechanism for Sheet Material, of which the following is a specification, reference being had therein to the accompanyin drawings. lhis invention relates to sheet feeding mechanisms such as are employed for automatically' feeding paper, cloth, .or other sheet material to a knife blade or punch or other member acting on said material.

The invention consists in the structural features and arrangement of parts hereinafter described and illustrated in the accompanying drawings where1n:-

F igure 1 is a plan view of a machme equipped with the improved feed mechanism;

Figure 2 is a longitudinal sectional view of the same;

Figure 3 is a view of the same in cross section on line 33 of Figure l;

Figure 4 discloses the feed mechanism 1n perspective.

In these views the reference character A designates an open rectangular frame carried at a suitable elevation by legs A and B is a feed'table secured within the frame A and comprising a series of parallel bars extending from end to end of the table and spaced to form slots B. C, C and D, D"

are lower'and upper co-acting feed members, the lower member comprising bars I, respectively fitting in the slots B and term1- nally connected beneath the feed table by cross strips C, and the upper member comprising spaced plates D transverse to the bars 0 and terminally rigidly connected by bars D. The outermost bars C of the lower' feed member carry pins E which slidably engage the bars D of the upper feed member. Thus the two feed members are constrained to move in unison as regards any horizontal travel but may shift vertically to or from each other F designates a main drive shaft upon which is mounted fastan oppositely projecting pair ofcams G and G respectively engaging n slotted heads H secured respectively to the IuIpper ends of a pair of sl de bars H and 2 traveling in suitable guide ways H The lower extremities of said slide bars are connected by pitmen I to arms J and J respectively fast 11 onrock-shafts K and L. The shaft K furt ermore rigidly carries an arm K which is connected by a swingingbar M'to a bracketM centrally depending'from the feed member 0, C. The

shaft L is mounted transversely in the delivery end portion ofthe frame A, extendmg below the feed table B, and a parallel shaft N is correspondingly mounted below the forward end of the lower feed member. Each shaft L and N rigidly carries a pair of bell cranks, one at each side of the table B, each comprising a long arm 0 and short arm 0. The front and rear bell crank arms 0 at each side of the table B are pivotally connected by a horizontal bar P, the two bars P being adapted to support the upper feed member through rollers Q, a pair of which is mounted upon each member AD projecting laterally from the exteremities thereof. The short arms 0- of the bell cranks respectively carry rollers R which engage beneath the end portions of. the outermost bars 0 of the lower feed member. 1

It is preferred to slot the arms J and J longitudinally, as indicated at S to permit adjustment of the pivot pins S whereby the pitmen I are attached to said arms, the efective length of the arms being thus regulable. There is further provideda pair of arch-shaped grip or handle-pieces T upon the upper feed member, secured preferably to the side bars D thereof, whereby said member may be readily removed, if desired.

The distance of this feed may be adjusted through a considerable range by varyin the adjustment of the pins S in the. slots of the arms on the shaft K.

The described feed mechanism is applicable to cutters and numerous other devices which require a step by step advance of sheet material to a member acting thereupon.

In the operation of the described mechanism, the feed members 6, C- and D, D by the cam G are actuated periodically forward and back, there being intervals of rest at each end ofthe stroke, obtaining during engagement of the circular edge portion of the cam with the top or bottom of the cam slot. Said feed members are actuated into or out of clamping relation by the cam G, such relation being established while the feed members are at rest in their retracted ositions, and being maintained durin the orward stroke of said 'feed mem ers. While the latter are at rest in their forward position, the work is operated upon in any desired manner, for example by the knife blade indicated at U) the clamping position of the feed .members bein maintained during such operation. While said members are still in their forward position the clamping members are released and the cam G then takes effect to retract said members. By reference to Figure 2, it will be seen that the bars Cof the lower feed memher, in coacting with the upper feed member to engage the work, rise slightly above the surface of the work table B. In releasing the work, said bars are depressed into the slots B allowing the work to rest freely upon the table B.

What I'claim as my invention is 1'. In a feed mechanism, the combination with a work supporting table, of upper and lower feed members for engaging work upon said table, pins projecting from one of said members, establishing a drive to the other member as regards movement parallel to the work supporting face of the table, and forming guides for the other members as regards movement of said members to or from each other, means for reciprocating the pin carrying member parallel to the work supporting face, and means for actuatmg the feed members to and from each other.

2. In a feed mechanism, the combination with a work table, of a pair of feed members engageable above and below the work, means for reciprocating said members in unison parallel to the work supporting face of the table, and a plurality of bell cranks actuable in time-d relation with said reciprocating motion having corresponding arms connected tothe upper feed member to raise or lower the same, and having their other arms engaging the lower said member for actuating the latter simultaneously with and reversely to the upper feed member.

3. In a feed mechanism, the combination with a suitable work table formed with a series of parallel slots, of upper and lower feed members, the latter having elements engagin in said slots, bars at each side of the sai table supporting the upper side member and forming a runway therefor, bell cranks having'corresponding arms engaging said bars and having their other arms engaging beneath the lower feed member,

means for reciprocating said feedmembers in unison, and means for rocking said bell cranks in unison and in timed relation with said reciprocating motion to v actuate said feed members to or from each other.

4. In a feed mechanism for sheet material a pair of upper and lower work clamping members comprising bars, the former resting freely and detachably upon the latter and means for reciprocating said members in unison.

5. In a feed mechanism for shcetmaterial a pair of reciprocatery upper and lower clamping members, hell cranks each having 1ts arms respectively supporting said upper and lower members, and means for rocking said bell cranks in unison.

6. In a feed mechanism, the combination with a work table, of upper and lower feed members comprising a plurality of elongated members, means for reciprocating said feed members in unison parallel to the work sup ortingface of said table, and means for shiting said lower feed member to and from the upper feed member in timed relation to said reciprocating movement.

7. In' a feed mechanism, the combination with a work table, of a feed member asso-. ciated with said table comprising a plurality of lower members and a plurality of upper members transverse to said lower members, means for reciprocating the feed member parallel to the work supporting surface of thetable, and means for shifting the feed member to and from said surface in timed relation to its reciprocating movement.

8. In a feed mechanism, the combination with a slotted work table, of a feed member comprising a pluralit of lower members engagin in the slots 0 said table, and a plurality 0 upper members transverse thereto, means for reciprocating said feed member longitudinally of said slots, and means for raising and lowering said feed member in timed relation to said reciprocating movement.

9.. In a feed mechanism, the combination with a work table, of a pair of upper and lower feed members comprising'a plurality of spaced members, said upper members being transverse to said lower members, means for reciprocating said feed. members in unison parallel to the work supporting face of said table, and means for actuating said feed members to and from each other in timed relation to said reciprocating movement., I I c 10. In a feed mechanism, the combination with a slotted work table, of a plurality of upper spaced members and a plurality of lower spaced members transverse thereto forming a feed means, said lower spaced members engaging in the slots of said table, means for reciprocating said members in unison longitudinally of said slots, and means for-actuating said upper and lower members to and from each other in timed relation to said reciprocating movement.

11. In a feed mechanism, the combination with a work table, of a pair of upper and lower feed elements comprising a plural-' ity of spaced members, sald members of theupper feed element being transverse to said members of the lower feed element, said jfleach other in timed relation to said recipro- 10 elements being respectively engageable with, eating movement. the top and bottom faces of Work upon said In testimony whereof I affix my signatable, means connecting said elements for' 'ture.

actuation, one from the other in a reoiprocating travel parallel to the work support- HORACE F. GRUMAN. ing surface of said table, means for effecting Witnesses: such a reciprocating movement, and means DAVID R. COHEN,

for actuating said elements to and from R. J. CLARKE.

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