US3247747A

US3247747A - Paper sheet perforator

Info

Publication number: US3247747A
Application number: US332669A
Authority: US
Inventors: Neal R Robbins
Original assignee: Burroughs Corp
Current assignee: Unisys Corp
Priority date: 1963-12-23
Filing date: 1963-12-23
Publication date: 1966-04-26
Anticipated expiration: 1983-04-26

Description

April 1966 N. R. ROBBINS PAPER SHEET PERFORATOR Filed Dec. 23, 1963 INVENTOR. NEAL R. ROBBINS.

A TTOR/VE'Y.

United States Patent 3,247,747 PAPER SHEET PERFORATOR Neal R. Robbins, Ypsilanti, Mich, assignor to Burroughs Corporation, Detroit, Mich, a corporation of Michigan Filed Dec. 23, 1963, Ser. No. 332,669 1 @lahn. ((31. 815-629) This invention relates generally to sheet handling apparatus and particularly to a sheet perforating device.

a with the accompanying drawings in which:

FIG. 1 is a vertical sectional view of a paper perforator, embodying features of the invention;

FIG. 2 is another vertical cross sectional view of the perforator, taken along the line 2-2 of FIG. 1;

FIG. 3 is a horizontal sectional view, taken along the line 3-3 of FIG. 1;

FIG. 4 is an exploded view in perspective of the perforator; and

FIG. 5 is a front fragmentary view of a sheet or record card having perforations made by the perforator of FIGS. 1 to 4.

Referring to the drawing by characters of reference, the numeral designates in general a paper perforator shown mounted behind a sheet guideway 12, by means of a mounting member or bracket 14. The guideway 12 may be the guideway for record sheets of a business machine of the type having automatic line find mechanism (not shown) to stop the feeding of a sheet 16 at a position corresponding to the location in the sheet of a line designating perforation 18, the last perforation made by perforator 10. For a more complete understanding of a line find mechanism, reference may be made to my copending application, Serial No. 116,434, filed June 12, 1961, for Front Feed Apparatus for Bookkeeping Machines.

In the present construction, the mounting bracket 14 is made of a suitable plastic material formed to provide a lower housing or body 20 having front and

rear walls

22 and 24 respectively which in part define an opening 25 which extends through the body 20. Mounted on the underside of the housing 20 is the sheet perforator 10, which overlies the lower end of the opening 25. The perforator 10 comprises a base 26 and a reciprocal perforator blade 28. The base 26 is in the form of a plate having its upper face recessed end to end, as at 30, to provide a channel-like slideway for the perforator blade 28. One end of the blade 28 is pointed to provide a paper piercing tool 32 which is preferably normally retracted within the slideway of base 26, as shown, for

example, in FIG. 3. A retaining plate 34 is provided for the perforator blade 28 and seats flat on the upper surfaces of the base plate 26, and the retaining and base plates are secured to the underside of housing 20 by screws 36.

Carried by the perforator blade 28 on the upper surface thereof is a gear rack 38 which projects upwardly through a clearance slot 40 in the retainer plate 34 to 3,247,741 Patented Apr. 26, 1966 mesh with a gear segment 42. A pair of connector pins 44 integral with and depending from the underside of the gear rack 38 removably connect the gear rack and perforator blade 34 for movement together. As shown, the pins 44 are preferably rectangular in cross section and extend respectively through and fit closely in a pair of rectangular holes 46 which are provided in the blade 28 in spaced apart relation longitudinally thereof. A slot 48 in the recessed wall 30 of the base 26 receives lower end portions of the coupling pins 44 which are guided by the sides of the slot to lend stability to the sliding action of the rack 38.

The gear segment 42 is aflixed to a shaft 50 that is supported by the bracket 14 in aligned bushings 52 secured in the bracket. An arm 54 affixed to shaft 50 may be connected by a link 55 to any suitable actuator, such as a solenoid (not shown). A spring 56 may be provided to bias the gear segment 42 to the position shown in FIG. 1, or the normally retracted position of the perforator blade 28. It will be apparent that when the arm 54 is pivoted clockwise, gear segment 42 Will be pivoted in like direction and through gear rack 38, move the blade leftward to pierce sheet 16. The inner face, as at 58, of side wall 22 stops rotation of gear segment 42 in a clockwise direction, FIG. 1, and the inner face 60 of the opposite side wall 24 stops rotation of the gear segment in a counterclockwise direction.

While I have shown and described my sheet perforator in considerable detail, it will be understood that many changes and modifications may be made without departing from the spirit and scope of the invention.

I claim:

A paper perforating device comprising a housing having a bottom wall and opposite side walls, a shaft journaled for oscillation on said side walls, a gear segment affixed to said shaft and disposed within said housing, a removable base plate forming in part said bottom wall beneath said gear, said base plate having an upwardly facing recess defining a slideway extending transversely to the axis of said shaft and having a guide slot in the .recessed surface extending longitudinally of said slideway, a paper piercing blade received and slidably guided by said slideway, said blade having a pair of longitudinally spaced apart apertures in overlying relation to said guide slot, a gear rack seating on said blade within said housing in mesh with said gear segment, a pair of connector pins carried by said gear rack and extending respectively through said apertures into said guide slot to connect said gear rack to said blade, a spring urging said gear segment against one of said housing side walls and yieldingly holding said blade in a retracted position within said housing, a retainer plate interposed between said base plate and said housing having a clearance slot to receive said gear rack with margins on opposite sides of the clearance slot overlying said blade, and means securing said retainer plate and said base plate together and to said housing.

References Cited by the Examiner UNITED STATES PATENTS 1,613,359 1/1927 Peters 30-272 1,817,428 8/1931 Takamatsu 83-629 2,435,628 2/ 1948 Jarman 83-629 3,043,586 7/1962 Boule 83-629 FOREIGN PATENTS 93,608 8/ 1897 Germany.

WILLIAM W. DYER, JR., Primary Examiner. I. L. SEITCHIK, Assistant Examiner.