US 4,056,993 AGranted

Sheet slitter and punch assembly

OwnerHenry J. Brettragerinventor

Life of this patent

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Abstract

Sheet slitting and punching apparatus for cutting a large elongate sheet of paperboard or similar material into a plurality of rectangular cards of uniform size and punching holes in each of the individual cards. A large sheet is fed along a conveying means having two tandemly arranged feed sections separated from each other by a transverse and a longitudinal slitting station. Both feed sections of the conveyor are driven from a common drive means, however, the upstream or infeed section is driven at a conveying speed substantially slower than that of the downstream or outfeed section. Transversely spaced slitters form longitudinally extending slits in the sheet as it is fed along the conveying means. When the feeding end of the sheet reaches a predetermined location near the upstream end of the outfeed conveyor, it engages a sensing element which immediately stops the conveyor drive. While the conveyor drive is stopped, a transverse slitting member is driven transversely across the sheet from one side to the other and a punch assembly is actuated to punch holes in each of the cards so formed. At the conclusion of a transversely slitting and punching operation, the conveyor drive is restarted and that portion of the sheet downstream from the transverse cut is carried forwardly away from the advancing sheet by the higher speed of the outfeed conveyor section so that the newly formed leading end of the sheet can actuate the sensing means when it arrives at the predetermined location on the outfeed section.

Apparatus for longitudinally and transversely slitting a sheet of paperboard or like material to form a plurality of individual rectangular cards comprising feed means for feeding an elongate sheet of material in a direction at a first speed along a first upstream section and at a second speed higher than said first speed on a second downstream section, a plurality of transversely spaced first cutter means operatively associated with said feed means at a location between said first and second sections for cutting spaced parallel longitudinal slits through said sheet as said sheet is advanced by said feed means, transversely extending support means overlying said feed means between said first and second sections and supported for vertical movement between a normally maintained upper position and an actuated lower position, second cutter means mounted on said support means for movement transversely of said feed means between a normally maintained first end limit at a side edge of a sheet on said feed means and an opposite end limit wherein said second cutter is located at the opposite side edge of a sheet in said feed means, said second cutter means being located clear of said sheet on said feed means when said support means is in said upper position and being located in cutting relationship with said sheet on said feed means when said support means is in said lower position, first reversible drive means for shifting said support means between upper and said lower position, second reversible drive means for driving said second cutter means between its first and second end limits of movement, and control means operable upon the advancement by said feed means of the leading end of the sheet to a preselected position on said feed means for sequentially:

a. stopping said feed means,
b. actuating said first drive means to drive said support means to its lower position,
c. actuating said second drive means to drive said second cutter means from said first end limit to said second end limit to separate the leading end portion of said sheet from said sheet,
d. actuating said first drive means to raise said support means,
e. simultaneously starting said feed means to advance the separated leading end portion of said sheet along said second section away from the remainder of said sheet, and
f. actuating said second drive means to return said second cutter means to its first end limit.

3 more elements

Facts

Application

05/708,835Filed 26 Jul 1976

Granted

8 Nov 1977

Term ends

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Classification12 codes

B65B 61/04
Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages: for severing webs,…
B26D 9/00
Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting
Y10T 83/2029
Initiated by means directly responsive to tool movement: in return motion of tool
Y10T 83/2094
Means to move, guide, or permit free fall or flight of product: means to move product at speed different from work speed

Abstract

Claims2