US2401310A - Perforating rule - Google Patents
Perforating rule Download PDFInfo
- Publication number
- US2401310A US2401310A US587379A US58737945A US2401310A US 2401310 A US2401310 A US 2401310A US 587379 A US587379 A US 587379A US 58737945 A US58737945 A US 58737945A US 2401310 A US2401310 A US 2401310A
- Authority
- US
- United States
- Prior art keywords
- perforating
- sheet
- perforations
- rule
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/18—Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9411—Cutting couple type
- Y10T83/9449—Spaced cut forming tool
Definitions
- This invention relates to an improved die or that which is known by printers and type setters as a perforating rule used for forming roWs of perforations in or through sheets of paper designed to be conveniently removed from an assembly of like sheets, such, for example, as in tablet or pad form commonly used in ofiices, schools, and households where but a sheet at a time is usually removed from the assembly.
- Fig. 1 is a side elevation of a common perforating rule as used in the printing art, though much enlarged,
- Fig. 2 is a like view of one of the improved rules or dies
- Fig. 3 is an end elevation of Fig. 2
- Fig. 4 is a still further enlarged fractional end elevation illustrating one method of sharpening the perforating teeth.
- the reference numeral I represents the rectangularly-shaped fiat body portion of a die com monly used for making spaced slot-like cuts or perforations, such a die obviously leaving intact at both ends thereof, a narrow strip along both edges of the sheet being perforated and undis turbed which is deemed the principal cause of failure of the severage of the sheet starting at the proper place in line with the perforations; whereas if the extreme outer edge of the sheet were cut or interrupted in the least, any twisting and pulling of the free end of the sheet will have already caused the initial break as evidenced by the double operation supra.
- terminal teeth 5 just a fraction longer than the intermediate ones as shown, and in which event, they may be sharpened on a slightly different plane than that of the smaller teeth, for example, as suggested in Fig. 4 of the drawing,
- a printers perforating rule having a row of spaced teeth-like perforating elements along one edge thereof, characterized by one of said terminal elements being somewhat wider and slightly longer than the intermediate ones of said teeth to positively insure the terminal perforations occurring through the marginal edge of said sheet.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Description
June 4, 1946. c, Y w 2,401,310
PERFORATING RULE Filed April 9, 1945 IN V EN TOR.
Patented June 4, 1946 UNITED STATES PATENT OFFICE PERFORATIN G RULE Clarence P. Mayhew, Duluth, Minn.
Application April 9, 1945, Serial No. 587,379
1 Claim. 1
This invention relates to an improved die or that which is known by printers and type setters as a perforating rule used for forming roWs of perforations in or through sheets of paper designed to be conveniently removed from an assembly of like sheets, such, for example, as in tablet or pad form commonly used in ofiices, schools, and households where but a sheet at a time is usually removed from the assembly.
Many forms of tickets having a removable portion, or such in their entirety, are thus provided also with rows of perforations or deeply imprinted lines more often adjacent the marginal edge of their holding means.
It probably is superfluous here to mention how often every one has experienced the uneffectiveness of such perforations in their initial functioning, or, in other words, starting the desired ultimate rendition at the proper place, to wit: at the exact terminus of the line of perforations in the very edge of the sheet or portion to be removed.
It so often starts at other than the right place; that in many instances applicant has known of the demand requiring a second operation at the time of assembly of such sheets in forming a V-shaped cut entirel the transverse depth of the side of the assembled sheets at the termini of the perforated line so that, at the least twisting stress on a single, or even plurality of sheets,
the rend will surely start just at the desired point.
Now to avoid the necessity of this second operation and to positively insure against repetition of unsatisfactory experiences as above-related, I have devised the invention disclosed in this application,
In the drawing forming part of the application, like reference numerals indicate like parts, and
Fig. 1 is a side elevation of a common perforating rule as used in the printing art, though much enlarged,
Fig. 2 is a like view of one of the improved rules or dies,
Fig. 3 is an end elevation of Fig. 2, and
Fig. 4 is a still further enlarged fractional end elevation illustrating one method of sharpening the perforating teeth.
The reference numeral I represents the rectangularly-shaped fiat body portion of a die com monly used for making spaced slot-like cuts or perforations, such a die obviously leaving intact at both ends thereof, a narrow strip along both edges of the sheet being perforated and undis turbed which is deemed the principal cause of failure of the severage of the sheet starting at the proper place in line with the perforations; whereas if the extreme outer edge of the sheet were cut or interrupted in the least, any twisting and pulling of the free end of the sheet will have already caused the initial break as evidenced by the double operation supra.
Now in providing a die, the functioning of which will produce optimum conditions for ideal results in removing the sheets, I add the novel features clearly illustrated in Figs. 2, 3, and 4, wherein 2 represents the body portion of the improved die having the usual row of tooth-like cutters 3 which in this instance are shown as having a knife-like cutting edge 4; however said row terminates at both ends in a wider tooth 5 which is sharpened in a like manner to the intermediate smaller teeth simply to insure the extreme edges of the sheet being out.
To further guarantee such positive cutting action as compared with that of the smaller teeth and especially in heavier paper, it may be advisable to have these terminal teeth 5 just a fraction longer than the intermediate ones as shown, and in which event, they may be sharpened on a slightly different plane than that of the smaller teeth, for example, as suggested in Fig. 4 of the drawing,
Having thus described my invention, what I claim and desire to secure by Letters Patent is:
A printers perforating rule having a row of spaced teeth-like perforating elements along one edge thereof, characterized by one of said terminal elements being somewhat wider and slightly longer than the intermediate ones of said teeth to positively insure the terminal perforations occurring through the marginal edge of said sheet.
CLARENCE P. MAYHEW.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US587379A US2401310A (en) | 1945-04-09 | 1945-04-09 | Perforating rule |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US587379A US2401310A (en) | 1945-04-09 | 1945-04-09 | Perforating rule |
Publications (1)
Publication Number | Publication Date |
---|---|
US2401310A true US2401310A (en) | 1946-06-04 |
Family
ID=24349562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US587379A Expired - Lifetime US2401310A (en) | 1945-04-09 | 1945-04-09 | Perforating rule |
Country Status (1)
Country | Link |
---|---|
US (1) | US2401310A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212383A (en) * | 1963-06-12 | 1965-10-19 | Grace W R & Co | Sheeting knife construction for bread wrapping machines |
EP0698454A1 (en) * | 1994-08-09 | 1996-02-28 | Seyfert Wellpappe GmbH & Co | Method and device as well as punchknife for making tearing perforations on corrugated paperboard products |
US5537905A (en) * | 1994-09-08 | 1996-07-23 | Zimmer Industries, Inc. | Nicked cutting rule |
US5868057A (en) * | 1996-07-23 | 1999-02-09 | Western Printing Machinery Company | Perforation rule for rotary cutting system |
-
1945
- 1945-04-09 US US587379A patent/US2401310A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212383A (en) * | 1963-06-12 | 1965-10-19 | Grace W R & Co | Sheeting knife construction for bread wrapping machines |
EP0698454A1 (en) * | 1994-08-09 | 1996-02-28 | Seyfert Wellpappe GmbH & Co | Method and device as well as punchknife for making tearing perforations on corrugated paperboard products |
US5537905A (en) * | 1994-09-08 | 1996-07-23 | Zimmer Industries, Inc. | Nicked cutting rule |
US5868057A (en) * | 1996-07-23 | 1999-02-09 | Western Printing Machinery Company | Perforation rule for rotary cutting system |
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