US1798250A - Paper trimmer - Google Patents

Description

March 31, 1931. c, GALVlN 1,798,250

PAPER TRIMMER Filed Aug. 18, 1927 Patented Mar. 31, 1931 UNITE STATES PATENT oFFicE CHARLES E. GALVIN, F SPRINGFIELD, OHIO, ASSIGNOR TO THE RIDGELY TRIMMER COMPANY, 01" SPRINGFIELD, OHIO, A CORPORATION OF OHIO PAPER TRIMMER Application filed August 18, 1927.

This invention relates to improvements 1n paper trimmers, it more particularly relating to a tool for trimming wall paper designed to run upon a straight. edge and ema ploying a rotating disk as the cutting element.

One of the objects of my invention is to provide improved means for mounting the cutting disk in the head of the tool whereby it) the disk may be readily adjusted to proper position with relation to the straight edge and held in that position by the ad ust1ng means to thereby maintain the disk out of running contact with the straight edge or any of the parts of the head.

A further object of the invention is to pro: vide an arrangement whereby the actlon oi the tool is such as to relieve the straight edge from sidewise stress, thus making it more easy to maintain the straight edge in proper position onthe line of: cut.

A further object is to provide a construction having guides on each side of the gage member to obviate the tendency of the tool to wobble on straight edge.

A further object of the invention is to provide an improved arrangement of gage in which a grooveway is provided for the overhanging flange of the straight edge which may be adjusted as to height to compensate for wear. 7 I

Further objects of the inventionwill appear from the accompanying description and claims.

In the accompanying drawings: Fig. 1 is an elevation of the forward end of a tool embodying the improvements.

Fig. 2 is an elevation of the rear side thereof.

Fig.3 is a top plan view. V Fig. 4 is an elevation of the forward side. Fig. 5 is a bottom plan. Fig. 6 is a section on the line a-a of Fig. 2. Fig. 7 is a section on the line 6-6 of Fig. 4. Fig. 8 is a section on the line 0-0 of Fig. 4. Fig. 9 is a section on the line dd of Fig. 5. Fig. 10 is an end view of the gage. Fig. 11 is an end view of the gage showing a modification.

Serial No.- 213,932.

Fig. 12 is a side elevation of the modified form of the gage.

Referring to the drawings, 1 represents a head having a recess 2, open at the bottom. This head is provided with laterally-projecting bosses 3 and 4 and also has an integral forwardly extending extension 5 and a thumb piece 6. r

The cutting disk is indicated at 7. As shown in Fig. 6 this cutting disk is mounted upon a two-part spindle, one of the parts 8 having a reduced threaded stem 9 which is screwed into a threaded opening in the other part 10 of the spindle; the disk being provided with an aperture to receive a shouldered portion 8' of the part 8 and being clamped firmly between the adjacent ends of two parts of the spindle. The boss 4 is provided with a bore throughout its length, and the inner portion of the boss 3 has a corresponding bore. Mounted in these bores on opposite sides of the recess 2 are ball bearings 11 for the disk spindle, the bearings and their races being inserted through the bore in the boss 4. which is afterwards closed by a plug 14, locked in position by a setscrew 15. Atter the disk 7 has been inserted through the open bottom of the recess in the head, the parts of the spindle are inserted through threaded openings in the outer portion of the boss 3 and in the plug 14 and screwed together to firmly clamp the disk. Screws 12 and 13 having knurled heads 12 and 13 are then inserted in the threaded openings and furnish means for adjusting the spindle axially to properly position the disk.

There is shown at 16 apart which is usually termed the gage to which the extension 5 of the head is pivotally connected and this gage is provided with a separate gage plate 17. the gage plate 17 having a lower horizontal flange 17' and anupper horizontal flange 17". The upper flange 17 is secured by screws 18 to a depressed shelf 16 formed on one side of the gage with the lower flange 17 spaced away from the lower surface of the gage a sufficient distance to receive the overhanging portion of the horizontal flange 19 of an angular wear plate 19 placed along one side of the straight edge 20; the horizontal port-ion of the wear plate overhanging a groove 21 on the upper surface of the straight edge in the usual way. Downwardly extending lugs 5', integrally formed with the gage 5, cooperate with the gage plate to prevent sidewise tilting of the gage on the st ight edge. hese lugs lying close to the outer face of the plate 19 when the gage in position on the straight edge.

The forward portion of the extension 5 is pivotally connected to the gage by a pivot screw 22, "ll l1 a coiled spring 22 surrounding the screw and having its end bearing on the respective parts to normally hold the head in raised position. A headed stud 23 is also connected with the gage and projects through a slotted opening 21 in the rear portion of the extension 5 toguide the head and assist in preventing lateral tilting movement of the head relatively to the gage.

The extreme forward end of the extension 5 has a pin 5 on which is mounted a roller 5 which acts as a stop to limit the upward swinging movement of the head under the action of the spring and also acts as a brake to hold the tool against sliding movement on the straight edge when not in use.

To eliminate friction between the and the overhanging wear plate of the straight edge, the gage is provided with a pair of antifriction rollers 25 which are inserted in transversely arranged bores in the gage which intersect the under face of the carriage so as to allow the rolls to project slightly therefrom and ride on the upper surface of the horizontal flange 19 of the wear plate of the straight edge.

In order to adjust the lower horizontal flange 17 of the strip relatively to these rolls 25 so as to allow the proper amount of clearance for the flange 19. shims may be placed between the shelf of the gage and the flange 17 of the strip as shown in Fi g. 10 in which a shim is shown.

In Figs. 11 and 12 there is shown a modification in the manner of adjusting the gage strip in which the horizontal portion 17 is dispensed with and screws 27 connect the vertical portion of the gage strip 17 with the side of the gage, these screws extending through slotted openings 28 in the ga ge strip to allow for vertical adJustment.

By the construction described in which the head is formed with a forward extension which is pivotally connected to the gage member, with the head in the rear of the gage member instead of pivoted, the head proper directed to the member, with the head and gage side by side, as in prior tools of this kind, it will be seen that a long leverage is secured which requires less pressure to depress thehead to cutting position with the resultthatit is less tendency for the straight edge. to be deflected from the line of cut. Withthe .old. form of cutters in which greater pressure was required to depress the head, great care had to be exercised on the part of the operator to maintain the straight edge in proper position, as the straight edge had a tendency to slip on the Zinc covering of the table, due to the pressure on the tool and thus cause the cutter to deviate from the proper line of cut. The long leverage also has the result of making the cutting operation more easy to perform, as it requires considerably less exertion on the part of the operator to depress the head against the tension of the spring.

Also, by reason of the extension, guides may be employed, such as the lugs 5, which cooperate with the gage plate to prevent wobbling of the tool on the straight-edge, and by reason of the having a separate gage plate adjustably connected with the proper, so as to adjust the height of the groove which receives the overhanging flange of the straight-edge, this tendency to wobble is further obviated.

My reason of the manner of mounting and adjusting the spindle for the cutting disk, the disk can be nicely positioned to the proper distance from the straightedge so that there will be no running contact between the side of the disk and the straight edge or with any part of the head.

Having thus described my invention, I claim:

1. In a tool of the character described, agage member constructed for slidable en gagement with a straight-edge, a head having a cutter carrying portion and a forward extension, said forward extension being arranged at the side of said gage member and pivotally connected to the forward portion of said gage member, a roller mounted on the forward end of said extension in front of said gage member, said cutter carrying portion being located at the rear of said gage member, and a rotary cutter mounted in said cutter carrying portion.

2. In a tool of the character described, a gage member constructed for slidable engagement with the straight edge, a head having a cutter carrying portion and forward extension, said. forward extension being ar ranged at the side of said gage and pivotally connected with the forward end of said gage, said gage and extension being also slidably connected at the rear end of said gage, lugs projecting from the under side of said extension. cooperating with said straight edge, a roller mounted for rotation upon the forward end of said extension in front of said gage, said cutter carrying portion being located at the rear of said member, and a rotary cutter mounted in said cutter carrying portion of said head.

3. In. a tool of thecharacter described, a recessed supporting head, means for slidably mounting said head upon a straight-edge,

' of a plate secured to said straight-edge a ali 'ned bosses formed on said head, a retatable spindle mounted in said bosses, a

disk connected with said spindle and located in the recessed portion of said head, and

1 means in said bosses at each end of said spindle for adjusting said spindle axially.

4. In a tool of the character described, a recessed supporting head, means for sndably mounting said head upon a straight ed e,

mounting said head upon a straight edge,=

aligned bosses formed on the respective sides of the recessed portion thereof, on of said bosses having a transversely arranged bore e2;- tending entirely therethrough, a plug for closin the outer end of said boss, the other boss also having a bore aligned with the first mentioned bore, anti-friction bearings mounted in the bores of said recess, a spindlemounted in said bearings, a cutting disk on said spindle in the recessed portion of said head, and set screws carried by said bosses and engageable with the ends of said spindle for adjusting the same axially in either direction.

6. In a tool of the character described, a gage member, a gage plate having a flange cooperating with the under surface of said gage member to form a groove-way to re ceive a portion of a straight-edge to slide-- bly connect said gage WVltll said straightedge, and means for adjustably securing said gage plate to said gage member to vary the height of said groove-way.

7. In a tool of the character described, a gage member, a separate gage plate secured thereto having the lower portion thereof bent at right angles to cooperate with the under surface of said gage member, said bent portion of said plate being arranged to run in a groove on the upper surface of a straightedge and the groove-way formed by said bent portion and the unoer surface of said gage member being arranged to receive the edge overhanging said groove, and means for so securing the said gage plate to said gage member that the gage plate may be adjusted vertically relative thereto.

8, In a trimmer, a cutting blade, a housing therefor, bearing sleeves in said housing on either side of said cutting blade and a bearing means carriedthereby for supporting said cutting blade, said bearing means consisting of a bearing cylinder carried in one sleeve and having internal threads, and an external- :ly threaded bearing pin carried in the other sleeve and engaging with said threads, said cylinder and pin having shoulders for limiw ing the lateral movement of the cutting knife.

9. In a trimmer, casing having relatively long bearing sleeves on either side thereof, a bearing means mounted therein, a cutting wheel mounted on said bearing means, a guid ing arm projecting a substantial distance from one endof said casing and having means for engaging the side of a brass cutting strip mounted upon a straight edge board, a memher pivotally mounted on said guiding arm adapted, to engage with the straight edge board to prevent the removal of the trimmer therefrom while permitting its horizontal movement relative thereto.

10. 111 a trimmer, a cutting blade, a housing therefor, bearing sleeves in said housing on either side of said cutting blade and a bearing means carried thereby for supporting said cutting blade, said bearing means consisting of a bearing cylinder carried in one sleeve having internal threads, and an externally threaoed bearing pin carried in the other sleeve engaging with said threads, said cylinder and pin having shoulders for limiting the lateral movement of the cutting knife, and adjustable members threaded within said respective bearing sleeves for positioning the cylinder and bearing pin and the cutting knife carried thereby.

11. In a trimmer, a casing having a substantially long bearing sleeve on either side thereof, a bearing means mounted therein, a cutting wheel mounted on said bearing means, a substantially long guiding arm projecting from one end of said casing having means on said arm for engaging the side of a cutting strip mounted upon a straight edge board, a member pivotally mounted on said guiding arm adapted to engage the cutting strip board to prevent the removal of the trimmer therefrom while permitting its horizontal movement relative thereto, and yield ing means between said retaining means and guiding arm for lifting the guiding arm, casing and cutting knife when the hand of the operator is removed from the casing.

12. I11 a trimmer, a casing having hearing sleeves on either side thereof, a bearing means mounted therein, a cutting Wheel mounted on said bearing means, a guiding arm projecting from one end of said casing having means for engaging the side of a cutting strip mounted upon a straight edge board, a member pivotally mounted'on said guiding arm adapted to engage the cutting strip board to prevent the removal of the trimmer therefrom while permitting its horizontal movement relative thereto, and yielding means between said retaining means and guiding arm for lifting the guiding arm, casing and cutting knife when the hand of the operator is removed from the casing, and

a guide roller mounted on the forward end of the arm for engaging with the top of the straight edge.

13. In a trimmer, a straight edge, a cutting strip thereon, a casing having bearing sleeves on either side thereof, a bearing means mounted therein, a cutting wheel mounted on said bearing means, a guiding arm projecting from one end of said casing having means for engaging the side of a cutting strip mounted upon a straight edge board, a retaining means pivotally mounted on said guiding arm adapted to engage the straight edge board to prevent the removal v of the trimmer therefrom while pern'litting its horizontal movement relative thereto, and yielding means between said retaining means and guiding arm for lifting the guiding arm, casing and cutting knife when the hand of the operator is removed from the casing, and a guide roller mounted on the forward end of the arm for engaging with the top of the straight edge board, said retaining means consisting of a pivoted retaining strip on the guiding arm and a U-shaped retaining member mounted on said retaining strip and depending within a groove in the straight edge projecting beneath a cutting strip overlying a portion of said groove.

In testimony whereof, I have hereunto set my hand this 12th day of August, 1927.

CHARLES E. GALVIN.

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