US1849760A

US1849760A - hermann

Info

Publication number: US1849760A
Authority: US
Publication date: 1932-03-15
Anticipated expiration: 1949-03-15

Description

March 15, 1932. w. HERMANN 1,849,760

STRIP SERVING MACHINE Filed May 51, 1928 4 Sheets-Sheet 1 March 15, 1932. w. HERMANN STRIP SERVING MACHINE Filed May 31, 1928 4 Sheets-Sheet 2 March 15, 1932. w. HERMANN STRIP SERVING MACHINE Filed May 31, 1928 55 4 25 sax-1H! 32 4 Sheets-Sheet 3 i l r I 1 l I.

March 15, 1932. w, M NN 1,849,760

STRIP SERVING MACHINE Filed May 51, 1928 4 Sheets-Sheet 4 Patented Mar. 15, 1932 UNITED STATES PATENT OFFICE 1 WOLFGANG- HERMANIN', OF CHICAGO, ILLINOIS," ASSIGNOR TO METAL SPECIALTIES MANUFACTURING 00., OF CHICAGO, ILLINOIS, A GORPORATION OF ILLINOIS STRIP-SERVING- MACHINE Application filed May 31, 1928. Serial'No, 281,803.

This invention relates particularly to stripsevering mechanism and associated mechanisms in a strip-serving machine.

The present application constitutes a confgitinuation in part of my application Serial No. 157,201, filed December 27, 1926.

The invention is illustrated in the accompanying drawings, in which Fig. 1 is aside elevational view of a strip- 1110 serving machine embodying the invention; Fig. 2, a front end elevational view of the same; Fig. 3, an enlarged broken vertical sectional view of the front end of the machine, the section being taken as indicated :16 at line 3-3 of Fig. 2; Fig. 4, a broken plan View; Fig. 5, an enlarged broken vertical sectional view showing a detail of the construction shown in Fig. 3; Fig. 6, a broken plan view showing a portion of the strip-sever- .:;.2 ing device; Fig. 7 a transverse vertical section taken as indicated at line 7 of F 3; Fig. 8, a broken vertical longitudinal sectional view showing the position of the parts after the cutter has operated to sever'the paper; Fig. 9, a view similar to Fig. 4, but showing a modification; Fig. 10, a broken sectional view taken as indicated at line 10 of Fig. 9; and Fig. 11, a View similar to Fig. 10, but showing the position ofv the parts after theknife has operated to sever the paper.

Referring to Figs. 1-8, A designates the frame of a machine, which comprisesoa hollow base casting A; aisurmounting hollow casting A and a pivoted cover A which is connected, by means of a pintle 1 with the member A B, strip-feeding mechanism mounted on the casing; C, a moistening device removably mounted in the frontend of the casing; and D, cutting mechanism disposed in front of the feeding mechanism.

The casing may be of any approved construction. Preferably, it is composed of castings. as shown. The paper roll (not shown) is housed in the rear portion of the frame beneath the cover A and the paper strip 2 passes from the .roll to the feeding mechanism. The casting A which is a hollow rectangular member, open at top and 5 bottom, isprovided with a-transverse inin Fig. 1 to effect feeding of the strip of paper; as'pring 6 which serves to return the crank to its normal position, where it engages an adjustable stop 7 a ratchet-wheel 8 rigidly mounted on the shaft 5; a main feed disk 9, journalled on the shaft 5 adj acent the ratchet-wheel; a pawl 10 mounted on the disk 9 and through the medium of which the disk 9 is actuated in the feeding operation; and a presser-member 11 supportedon a pivot 12 ,andreqnipped with anidle presser-roll 13, the member 11 being held yieldingly inthe depressed position by a spring 14. The web, or bead, 3 of the casting A terminates some distance back of the front end of the frame. i

The moistener device C comprises a water font 15 removably supported on a plate 16 and adapted to be withdrawn through the opening 4; a hollow-bracket 17 having a webportion 1'? and arms 17 which are slotted and which engage the upper margin of the front wall of the font; a clip 18 secured, by means of rivets 19,'to the arms 17"; a capillary pad 20' adjustably mounted in the clip 18; and a presser-member21 having its rear portion equipped witha pintle 21 and hav ing a weighted front end-portion 21 which co-acts with the upper edge of the moistenerpad. The pintle 21 loosely engages perfora tions 22 in ears 1?? with which the bracketmember 17 is equipped. The font 15 preferably is drawn from sheet brass and is equipped with an outwardly struck spoutportion 15 at its front wall.

23 provided witha slot 23; an adjustable horizontal shearing-blade 24; a swinging arm 25 supported on a pivot 25* carried by a lag 23* with which the plate 23 is provided;

The cutting mechanism Dcomprises a plate a blade 25 carried by the arm 25; a link 26 connected with the free end of the arm 25; an arm 27 having its rear end pivoted on the shaft 5 and having its front end connected with the lower end of the link 26, the arm 27 having an offset portion 27 (Figs. 4 and 8) a leaf-spring 28 rigidly secured to the shaft 5; and a rock-shaft 29 equipped with a latcharm 29 adapted to releasably engage the transverse portion 27 a of the arm 27 and equipped also with a trip-arm 29 adapted to be engaged by the crank 5 at the end of the feeding stroke.

As appears from Figs. 6 and 7, the plate 23 is equipped with a slot 30 which is engaged by an arcuate guide-member 31 with which the arm 25 is equipped. The plate 23 is secured to the casting A by means of capscrews 32. These screws pass loosely through perforations 2 with which the horizontal blade 24 is provided. Thus, the blade 2 1 may be adjustably clamped upon the plate 23. The shearing-edge 2 1 of the blade 24rprojects over a portion of the slot 23 It will be noted from Fig. 3 that the upper surface of the blade 24 lies slightly below the upper surface of the wall 3; also that the exposed surface of the plate 23 in advance of the front edge of the blade 2% is below the plane of the blade; also that the rear edge of the web 17 is slightly below the plane of the upper surface of the plate 23. The purpose is to facilitate the passage of the advance edge of the strip of paper in the feeding operation.

The arm 25 is held in the elevated position by a spring 33 whose lower end is received in a socket 33 with which the frame-member A is provided, as shown in Fig. 7.

The blade 25 is provided with a central piercing point 25. In the operation, the point pierces the paper, and then effects shearing in both directions.

The latch-arm 29 is yieldingly held in the latching position by means of a spring 3 1 whose lower end is secured to the base portion of the arm and whose upper free end engages the rear end of the plate 16.

A presser-plate 35 is interposed between the screws 32 and the idle feed-roll B, this plate resting upon the paper strip 2 and being readily removable.

The stop 7 is in the form of a short bolt equipped with a wing-nut, this bolt being adjustably secured in an arcuate slot- 7 with which a clip 7 is provided. This clip is detachably secured to the casting A by means of screws 7 In the operation of the machine, the paper strip is fed forwardly by swinging the crank 5 counter-clockwise, as viewed in Fig. 1. In this operation, the ratchet-wheel 8, through the medium of the pawl 10, actuates the feedwheel 9. In this operation, the spring 6 is placed under tension. Also, in the feeding operation, the leaf-spring 28 engages the arm 27 before the end of the feeding stroke, so that the leaf-spring is placed under flexure; and, at the end of the feeding operation, the crank strikes the trip-arm 29, thus withdrawing the latch-arm 29 and permitting the arm 27 to be thrown downwardly under the force of the spring 28. This results in a quick downward movement of the arm 25, so that the paper is cleanly severed.

In the operation of feeding the paper, the advance end of the strip passes through the channel between the presser-member 21 and the web 17 and the mucilage surface of the strip is pressed into engagement with the upper edge of the moistener-pad 20, the paper being held against the moistencr-element by the resser-member 21.

In the modification shown in Figs. 9-11, the construction corresponds rather closely to the construction previously described, and corresponding parts are designated by the same reference characters. In the modification, however, the leaf-spring 28 is omitted. For it is substituted an arm 28 which is rigidly secured to the shaft 5 and which has at its free end a rearwardly extending arcuate portion 28 which is equipped at its free end with a disk 28. Upon the disk is seated one end of a coil-spring 284. The other end of the spring engages a washer 28, which, in turn, is adapted to engage a shoulder 27 with which the arm 27 is provided. As shown in Fig. 9, the shoulder 27 is afforded by means of a slotted lug with which the arm 27 is equipped. This slot permits the outer end of the arm 28 and the arcuate member 28 to work through it while the spring 28 is being compressed during the final portion of the operation of feeding the paper strip. At the end of the strip-feeding operation, the arm 27 is tripped, permitting the swinging knife blade to be actuated.

The advantage of the construction shown in Figs. 9-11 is that there is less danger of the spring 28 crystallizing than there is of the leaf-spring 28 crystallizing.

The construction described is simple, well adapted to its purpose and highly effective.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

hat I regard as new, and desire to secure by Letters Patent, is:

1. In a machine of the character set forth, in combination with strip-feeding mechanism comprising a rock-shaft equipped with a crank for actuating it in one direction and a spring for returning the rock-shaft, a feedwheel journalled on said rock-shaft, and a ratchet device connecting said rock-shaft and said feed-wheel: severing mechanism comprising: a normally raised cutting-member;

actuating means therefor, including a pivoted arm and a connecting link; a latch device controlling said arm; and an arm mounted on said rock-shaft and provided with an arcuate extension equipped with a coil-spring which is adapted to engage said first-named arm and be placed under compression during the working stroke of said rock-shaft.

2. In a machine of the character set forth, in combination with strip-feeding mechanism comprising a rock-shaft equipped with a crank for actuating it in one direction and a spring for returning the rock-shaft, a feedwheel journalled on said rock-shaft, and a ratchet device connecting said rock-shaft and said feed-wheel: strip-severing mechanism comprising: a transversely extendingswinging cutter-blade disposed above the path of the strip; a link depending from said blade a pivoted arm connected with said link; a latch normally restraining said arm; a trip for said latch; an arm secured to said rock-shaft and equipped with a reversely curved extension; and a coil-spring mounted on said extension and adapted to engage said first-mentioned arm and be placed under compression during the working stroke of said rock-shaft.

3. In a machine of the character set forth, in combination with strip-feeding mechanism comprising a rock-shaft equipped with a crank for actuating it in one direction and a spring for returning the rock-shaft, a feed- Wheel journalled on said rock-shaft, and a ratchet device connecting said rock-shaft and said feed-wheel: severing mechanism comprising: a normally raised transversely disposed swinging cutting-member; a link depending from said member; an arm having its rear end pivotall mounted on said rockshaft; a latch normally restraining said arm; a trip for said latch; and an arm fixedly secured to said rock-shaft and equipped with a coil-spring adapted to be placed under com pression against said first-mentioned arm 5 during the working stroke of said rock-shaft,

4:. In a machine of the character set forth, in combination with strip-feeding mechanism comprising a rock-shaft, strip severing mechanism including a movable cutter blade disposed above the path of the strip, and means actuated by said rock-shaft for actuating said severing mechanism and including a pivoted arm operatively connected to said cutter blade, a latch normally restraining said arm, a trip for said latch, a second arm secured to said rock-shaft and equipped with an arcuate extension, and a coil spring mounted on said extension and adapted to engage the first mentioned arm and to be placed under compression during the working stroke of said rock-shaft.

WOLFGANG HERMANN.