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US3834291A Expired / Lapsed US ⏱️ 0.0 years remaining

Stripping apparatus as used in the production of cardboard and like blanks

Assignee: Deritend Engineering Co Ltd
•
Filing: 1972-07-07
•
Granted: 1974-09-10
•
Expires: 1992-07-07
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Abstract

Abstract The invention provides stripping apparatus for use in the manufacture of cardboard and similar blanks in which the cut blanks are passed through a roll pair, one of the rolls having pins or projections to engage with the scrap areas of the blank and deflect them out of the feed path, and in which each roll is encircled by a series of conveyor belts so that the belts serve to maintain the blank in the feed path, the belts being adjusted along the axes of the rolls so as to engage the blank only over the areas which are to be maintained in the feed path and not over the areas which are to be displaced out of the feed path as scrap; in a modification, some of the belts extend about the one roll and through the feed path, these additional belts being arranged so as to engage only with the scrap material and they thus serve to convey the scrap material out of the feed path.

Inventors

  • 👤 T Bishop

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 21:19
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/18; B26D7/1818; B26D2007/1872; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2074; Y10T83/2079

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 135 words
Stripping apparatus for use in the production of cardboard and other blanks to remove scrap areas from the blanks, comprising a backup roller having a substantially continuous peripheral surface, and a stripping roller carrying a pattern of projections to register with the scrap areas and displace them out of the plane of each blank, said rollers forming a nip through which the blanks are fed, wherein the improvement comprises a plurality of superimposed pairs of endless conveyor loops, the loops of each pair extending through said nip and also beyond said nip on both sides of said rollers, so as to guide a blank sandwiched between the loops and to prevent the blank from becoming deformed or wrapped around a roller, the pairs of loops being spaced apart to permit operation of the projections therebetween.
Claim 2
Dependent Claim 135 words
Stripping apparatus for use in the production of cardboard and other blanks to remove scrap areas from the blanks, comprising a backup roller having a substantially continuous peripheral surface, and a stripping roller carrying a pattern of projections to register with the scrap areas and displace them out of the plane of each blank, said rollers forming a nip through which the blanks are fed, wherein the improvement comprises a plurality of superimposed pairs of endless conveyor loops, the loops of each pair extending through said nip and also beyond said nip on both sides of said rollers, so as to guide a blank sandwiched between the loops and to prevent the blank from becoming deformed or wrapped around a roller, the pairs of loops being spaced apart to permit operation of the projections therebetween.
Claim 3
Dependent Claim 64 words
Stripping apparatus according to claim 1 including two additional loops, one encircling each end of the roller carrying said projections, a portion of each such additional loop being arranged to extend through and beyond the plane of the feed path defined by said pairs of conveyor loops to thereby deflect marginal scrap areas of the blanks out of the plane of the feed path.
Claim 4
Dependent Claim 22 words
Stripping apparatus as claimed in claim 1 wherein at least the conveyor loops which encircle the backup roller present narrow blank-engaging surfaces.
Claim 5
Dependent Claim 20 words
Stripping apparatus according to claim 3 wherein the conveyor loops which encircle the stripping roller present wide, flat blank-engaging surfaces.
Claim 6
Dependent Claim 25 words
Stripping apparatus according to claim 1 wherein the loops are mounted for lateral adjustment with respect to the direction of feed movement of the blanks.

References Cited (Backward Citations)

US1987224A Cited
US2410611A Cited
US3524364A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-09 1978-03-11 1978-09-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-09 1982-03-11 1982-09-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-09 1986-03-11 1986-09-10 $7700.00 Window Closed / Lapsed

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