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Publication numberUS909285 A
Publication typeGrant
Publication dateJan 12, 1909
Filing dateApr 15, 1908
Priority dateApr 15, 1908
Publication numberUS 909285 A, US 909285A, US-A-909285, US909285 A, US909285A
InventorsHerman Denburger
Original AssigneeHerman Denburger
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 909285 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Jan. 12. 1909.


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Specification of Letters Patent.-

Patented Jan. 12, 1909.

Application filed April 15, 1908. Serial No. 427,146.

To all whom it may concern:

Be it known that I, HERMAN DENBURGER, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Punches, of which the following is a specification.

This invention relates to perforating machines, and particularly to such as are used for punching holes in the margins of sheets ifcir loose leaf books, letters for files, and the ice.

The object of the invention is to produce an improved device of the kind, capable of use with one or more punches, and in which the punches can be readily removed or changed so as to punch holes of various sizes or shapes, whereby the machine will be adapted for any kind of work. The means for changing the punches are such that it may be very quickly done, without the use of tools, and a further feature is that the punches when put in place may be adjusted to any desired position, and the holes punched accordingly.

The invention is illustrated in the accompanying drawings in which- Figure 1 is a plan of the machine. Fig. 2 is a front elevation. Fig. 3 is a cross section on the line 3-3 of Fig. 1. Fig. 1 is an end view showing the clamp for the gage rod.

Referring specifically to the drawings, 6 indicates a, base which may be made hollow if desired, to form a box or casing to receive the punchings, and the top surface has a slot 7 through which the punchings drop into the box below. Fastened to the top of the base, along the rear edge of the slot, is a plate 8 the ends of which are bent up to form standards 9. A rock shaft 10 is supported between the standards upon eccentric pivot screws 11, forming in effect a long eccentric which is provided with a handle 12 and which operates the punches.

, Each punch is mounted in a holder consisting of a base or bottom piece 14 which is forked at the front end as at 15 to receive the margin of the sheet 01' sheets to be punched. The punch 16 works through holes or dies in said forks, and said punch is pivoted at its upper end, as at 17 to a swinging arm 18 which is hinged at its rear end, as at 19, to the base plate or piece. The arm 18 and the punch carried thereby are normally lifted by a spring 20 coiled around a screw 21 the head of which acts as a stop for the lift of the arm. The shape or size of the punch may be varied as desired, each separate punch being mounted or supported in its own holder, and when new punches are to be used the holders are bodily removed, and new ones substituted.

The base piece 1 1 of each holder is provided with openings to receive a rod 23 and a bar 2 1, both of which extend through alined holes in the standards 9. The rod 23 and bar 2 1 may be pulled out lengthwise to remove or replace the punch holder. When. the punch holders are in place on the rod and the bar the arms 18 project under the roller 10, and when said roller is turned by means of the handle the punches are pressed down through the sheets in the forks of the holders. The holders may be slid along the bar 23 to any desired position, and when properly located are held in place by means of a cam clamp 25 which has legs 26 which straddle the rear end of the holder, said legs being provided with holes through which the rod 23 extends, and with cam surfaces 26 which when the clamp is pressed down bear against the plate 8 and so cause a bind which prevents the clamp from moving and consequently holds the punch holder in place.

In addition to its function of holding the punch holders in place the sliding bar 24 acts as a gage, having a forwardly extending linger 30 at one end, and the bar may be shifted lengthwise to bring this finger closer to or farther from the punches, and said finger will act as a gage for the edge of the sheets. Vt hen properly set the gage may be fixed by means of a cam clamp 31 pivoted to the adjacent side of one of the standards 9.

When the punch holders are in position, as described, the jaws or forks at the front end thereof project over the slot 7 and the top surface of the lower jaw is preferably flush with the surface of the base or table, whereby papers can be readily slipped in under the punches, the front end of the lower jaw resting in a rabbet 32- formed along the front edge of the slot 7. Said edge may be also provided with a scale of inches 33 to enable the punches to be properly located.

Obviously one, two or more punch holders may be put in place upon the bars 23 and 24, and hence any desired number of holes can be punched at one operation. This adapts the machine for work of various kinds, so that it may be used to punch sheets for various types of loose leaf books, as well as for punching letters to receive eyelets,

filing devices and the like. It requires but a moment to change the unches, since all that has to be done is to oosen the clamps 25 and 31 pull out the rods 23 and 24 far enough to allow the punch holders to be clipped H and new ones substituted, after which the rods are pushed in and fastened and the punch holders clamped at adjustment.

I claim: 1. In a punching machine, the combination of a base and standards thereon, a bar access to the base piece and extending over the jaws, and a punch pivoted at its upper end to the front end of the arm and adapted to work through the holes in the jaws. 3. In a unching machine, the combination of a ame, a plurality of removable punch holders mounted in alinement therein, each punch holder having a lower fixed piece and a swinging upper piece carrying the punch, and an eccentric shaft extending across above the said upper pieces and in line above the punches carried thereby and adapted when turned to depress the same and force the punches through sheets on the lower piece. 7

In testimony whereof I afiix my signature, in presence of two witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3022000 *Jul 2, 1957Feb 20, 1962Texas Instruments IncMultiple punching machine for paper tape, cards, etc.
US5778750 *Feb 7, 1996Jul 14, 1998Acco Brands, Inc.Lever-operated push flap for manual punch
US6269721 *Nov 27, 1998Aug 7, 2001Primax Electronics Ltd.Electric paper punch
WO1996001173A1 *Jun 29, 1995Jan 18, 1996Acco Usa, Inc.Lever-operated push flap for manual punch
Cooperative ClassificationB27B27/04