US1609619A

US1609619A - Paper trimmer

Info

Publication number: US1609619A
Application number: US735783A
Authority: US
Inventors: Charles E Galvin
Original assignee: RIDGELY TRIMMER Co
Current assignee: RIDGELY TRIMMER Co
Priority date: 1924-09-04
Filing date: 1924-09-04
Publication date: 1926-12-07
Anticipated expiration: 1943-12-07

Description

Dec. 7,1926. 1,609,619

C. E. GALVIN PAPER TRIMMER Filed Sept. 4, 1924 3 Sheets-Sheet 1 8 nucul'oz 35 Whmvo Dec. 7 1926. 1,609,619

c. E. GALVIN PAPER TRIMMER Filed Sept. 4, 1924 3 Sheets-Sheet 2 Smucnfoz Dec. 7-, 1;,1(g. 1,609,619

C. E. GALa/IN PAPER TRIFIMER Filed Sept. 4, 1924 3 SheetsSheet S .az a J W 6 32 -34 Patented Dec. 7, 1926. f

UNITED STATES PATENT OFFICE.

CHARLES E. GALVIN, F SPRINGFIELD, OHIO, ASSIGNOR- TO THE BIDS-ELY TRIMMER COMPANY, OF SPRINGFIELD, OI-Il'O, A COBEOEATZON OF OHIO.

PAPER TRIMMER.

Application filed September 4, 1924.

My invention relates to paper trimmers of the kind which are more particularly adapted for trimming wall paper and the like.

In paper trimmers of this type now in general use there is employed a single cutting disk carried by a pivoted spring-pressed head mounted upon a support which slides along the straight edge, it being necessary for the operator to press the cutting disk against the paper as the tool is slid along the straight edge, the operator holding the straight edge in position with one hand while operating the tool with the other hand. It has been customary to place a strip of zinc along the edge of the table beneath the tool to protect the table from the action of the cutter.

One of the objects of my invention is to provide a paper trimming tool which requires no pressure upon the part of the operator to perform the cutting operation.

A further object of the invention is to provide an arrangement whereby the paper during the cutting operation is pressed against the straight edge instead of against the table which obviates the necessity of providing the table with a protecting strip of zinc or other material.

A further object of the invention is to provide an arrangement whereby the paper can be trimmed in a perfectly straight line without any particular skill upon the part of the operator.

With the tools now on the market it is impossible to cut a very narrow strip from the paper because of the wrinkling of the paper, and a further object of my invention is to provide arrangements by which a narrow strip may be readily cut from the pa per unhampered by any wrinkling of the paper or other conditions which make this impractical with the old form of tool.

A further object of my invention is to provide a device for trimming paper which will be simple in construction, economical in manufacture, effective in its operation, and easily manipulated without the necessity of any particular skill upon the 'part of the operator.

In the accompanying drawings:

Fig. 1 is a front elevation of a cutting tool embodying the improvements.

Fig. 2 is a rear elevation of the same.

Fig. 3 is a top plan view of the same.

Serial No. 735.783.

Fig. 4; is an end view of the tool showing in section the straight edge and a portion of the table used in conjunction therewith.

Fig. 5 is a section on the line 5.5 of Fig. 2.

Fig. 6 is a top plan view partly broken away of the table and straight edge.

Fig. 7 is an end View of the table and straight edge.

Fig. 8 is an enlarged detail View of one set of the devices for connecting the straight edge to the ends of the table.

Fig. 9 isan end View of the same.

Referring to the drawings, 1 represents a casting which forms themain body or' support of my improved tool. The rear portion of the upper edge of this body is depressed, as indicated at 2, and has an upturned projection 3 to form a convenient thumb rest for the operator. The forward portion of the body is provided with an annular recess 1} and a laterally projecting boss 5, concentric to the recess. The boss is bored to provide a bearing for an arbor 6 of a cutting disk 7, the disk and arbor being secured together by a screw 8 which projects through an opening in the disk and is threaded in the arbor as shown in Fig. 5. The outer end of the boss is threaded to receive a threaded plug 9 and between the plug and the end of the arbor is a coiled spring 18, which acts as a thrust member for the arbor. The disk 7 projects slightly below the lower end of the body 1 and the cutting edge of this disk is preferably bevelled as indicated at 7' in Fig. 5.

Projecting from the rear portion of the lower edge of the main body 1 is an integral extension 10 and pivoted to this extension 10 by the pivot screw 11 is a lever 12. The long arm of this lever projects forwardly and at its forward end has a laterally extending integrally-formed boss 13 which is provided with a bore to provide a bearing for an arbor 14:. The arbor is interiorly threaded to receive a screw 15 which rigidly connects to the arbor a cutting disk 16 which is preferably provided with a flat periphery 16. The outer end of the boss 13 is threaded to receive a plug 17 which constitutes a thrust member which can be adjusted to properly position the cutting disk. The rear end of the lever 12 has rigidly connected there with an upwardly projecting arm 19 which has secured thereto a wear disk 20. Between this disi: E20 and the main body 1 is inserted a coil spring 21, the forward end of the spring being located in a small chamber or recess in the body 1 indicated at 22 in Fig. l.

Secured to the rear side of the body 1 is a gauge strip 23, this strip being fastened to a serie of three posts, one of which is shown in dotted lines in Fig. 5 and indicated by 24;, with rollers on the posts. The under edge of the gauge strip has a series of integral lips 26 extending laterally toward the forward side of the tool. The straight edge, indicated at 27. has a longitudinallyextending groove 28 on its upper surface and a metallic plate 29 which partially overhangs the groove.

Referring to Figs. 6, T, 8 and 9. the straight edge in the present case is shown pivotally connected at each end to the table 31. Each end of the straight edge has clamped thereto the horizontal portion 82 of an angle-shaped plate, the vert cal portion 33 of which is attached to an arm ill which is pivoted at to a plate 36 which projects forwardly from the table. The plate 36 is firmly secured to the ends of the table and for the purpose each end of the table has a reinforcing plate 37 secured thereto in any suitable way, which plate 3? has a pair 0t threaded studs 38 rigidly secured thereto, the studs projecting through openings in the plate 36 and receiving nuts 39 by which the plate 36 may be rigidly clamped in position. Each of the horizontal portions of the angle plate is secured to the corresponding end of the straight edge by providing the straight edge with a threaded stud d0 passing through a slotted opening 41 in the plate and receiving wing nut 42 (Fig. 4). In the folded position of the arms 34 the straight edge will lie upon the torward edge of the table but slightly over hanging it as shown. lVhen it is desired to place the paper to be out upon the table the straight edge is swung to the dotted line position of Fi 7. The vertical portion of each angle plate is so connected to the corresponding arm 34- as to permit the straight edge to he raised slightlv from the table so as to adjust the position of the paper beneath the straight edge when desired and to that end the portion of the angle plate is provided with a plurality of slotted openings 43 to receive screws at which are threaded in the arm For transportation purposes the wing nuts 42 and the nuts 39 are removed so as to perinit the parts to be disconnected.

The inner side of the bodv l of the tool adjacent the lower part of the recessed portion thereof is provided *ith flat faces 1.

In operation the tool is placed upon the straight edge by inserting the lips 26 be neath the overhanging portion of the plate 29 with the faces 1 of the body ot' the tool closely adjacent the forward side of the stra it edge, with the cutting disk 16 hearing with a yielding pressure against the under side of the straight edge as shown in T13. l. The cuttingdish T is pres ed with lding pressure against the cutting disk 16 and the tin: st member 17 of the cutting disk lli so adjusted as to bring the cutting point of the two disks slightly beyond the forward edge oi the straight edge as sh' iivn in Figs. l and The paper having been laid upon the table and the straight edge adjusted thereto same is clamped between the underside of the straight edge and the periphery of the cutting dish 16 during the shearing operation which is accomplished by sliding the tool along the straight edge.

It will he noticed that the top ill of the table overhangs the supporting part 2-36 thereof so as to :wcoiniuodate the boss 13 and when it is desired to remove the straight. edge from the top of the table to permit the insertion ot a new piece of paper or otherwise the tool slid to either one of the ends of the top ill. ot the table which recc. rd as indicated at 31 so that the straight edge and tool may be tilted in the manner hct'ore indicated lly this construction it will be seen that wall paper or other paper or material of that character may readily be trinin'ied without the exercise of any particular skill upon the part of the operator. The operator after the paper has been placed upon the table and the straight edge swung to position on the table merely straightens the paper so as to cause the forward side ot the straight edge to lie substantially along the desired line of cut after which the operator merely pushes the tool along the straight edge. lly reason of the fact that the straight edge is in fixed parallel position relatively to the table and that the paper will he firmly held between the straight edge and cutting disk 16 a straight cut is insured without any attention upon the part of the operator as it is impossible for the straight edge to move from the line of cut as would he the case where the straight edge is held in position by one hand of the operator while operating the tool. with the other hand. Furthen no down, pressure is required upon the tool, thus making the trimininn; operation less laborious upon the part oi the operator and it is also possible to remove from the paper a very narrow cut when desired for the reason that the paper is firmly held upon the straight edge by one of the cutters at the immediate point where the cutting operation takes place so that there will be no interference by wrinkles in the paper or otherwise with the trimming operation. By means of the threaded plug 17 the cutting disk 16 may be adjusted to bring its cutting edge in proper relation to the forward edge of the straight edge, while the spring 18 presses the disk 7 firmly against the disk 16 and compensates for any wear between the disks. The rollers constitute anti-friction devices which roll along the upper surface of the straight edge and assist in the easy operation of the tool.

Having thus described my invention, I claim:

1. In a paper trimmer, a main support, a

cutting disk carried by said support, a spring-pressed arm pivoted to said support, and a second cutting disk carried by said arm and cooperating with said first disk.

2,111 a paper trimmer, a main support, a cutting disk carried by said support, a lever pivoted to said support, a cutting disk carried by one end of said lever with its cutting edge overlapping the cutting edge of the first mentioned disk, an arm projecting from the other end of said lever, and a spring between said arm and support- 3. In a paper trimmer, a main support, a cutting disk carried by said support, means for axially adjusting said disk, a springpressed auxiliary support pivotally connected with said main support, a second cutting disk carried by said auxiliary support and partly overlapping said first disk, and a spring associated with one of said disks for holding the overlapping parts of said disks in yielding contact one with the other.

4. In a paper trimmer, the combination, with a straight edge, of a tool having a main support, interengaging devices between said tool and straight edge, a pair of cooperating cutting disks carried by said support in partly overlapping relation, one of said disks being arranged at a side edge of said straight edge, and means for holding the other disk in yielding engagement with the under portion of said straight edge.

5. In a paper trimmer, the combination, with a straight edge, of a tool having a main support, interengaging devices between said support and straight edge, a spring pressed auxiliary support pivoted to said main support, and cooperating cutting disks carried by said main support and said auxiliary sup port in partial overlapping relation, the disk mounted on said main support being arranged at a side edge of said straight edge and the disk mounted on said auxiliary support having its periphery in yielding engagement with the under portion of said straight ed e.

g The combination of a table, a straight edge pivotally connected with said table, and a cutting tool slidably mounted on said straight edge, comprising a pair of cooperating cutting disks, one of which lies in close proximity to the outer edge of said straight edge and the other of which has its periphery in yielding contact with the under side of said straight edge.

7. In a paper trimmer a main support, a straight edge radially mounted on fixed pivots having a portion thereof projecting beyond the main support, a plurality of cutting disks slidingly mounted on said straight edge, one cutting disk having its cutting edge bearing against the lower surface of the paper in close proximity to the bottom surface of the straight edge, and the other disk having its cutting edge bearing against the upper surface of said paper.

8. In a paper trimmer a main support, a

straight edge having a portion extending beyond the support, a tool slidingly mounted on said straight edge, a pair of upper and lower disks on said tool, the edge of one disk bearing against the lower surface of the paper and the edge of the other disk bearing againstthe upper surface of said paper, said tool and disks being capable of having a sliding action independent of any pressure exerted downwardly upon the disks, thereby cutting said paper with a minimum of friction. 9. In a paper trimmer the combination with a fixed supporting surface of a removable straight edge having a portion thereof projecting beyond the fixed surface, the paper also projecting beyond the straight edge, two co-acting cutting disks located at a point in proximity to the projecting edge of the straight edge, one disk having its cutting edge bearing against the lower surface of the paper near the bottom of the straight edge and the other disk having its edge bearing against the upper surface of the paper near the forward edge of the straight edge, said disks being capable of having a sliding action along the straight edge without pressure being exerted downwardly upon the cutting disks.

In testimony whereof, I have hereunto set my hand this 26 day of August 1924.

CHARLES E. GALVIN;