Apparatus for sheet having indicia registered with lines of termination
First Claim
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1. An apparatus for registering indicia with lines of termination in a transported sheet, the apparatus comprising:
- a means for transporting a sheet in a first direction;
a means for applying spaced indicia to the sheet at predetermined repeating intervals and at a first rate;
a means for sensing the position of the indicia on the sheet;
means for imparting lines of termination to the sheet at a second rate, said means for imparting lines of termination comprising at lest one rotatable blade and a chop-off roll, said lines of termination comprising a first plurality of chop-off cuts and a second plurality of perforations intermediate said chop-off cuts, said chop-off cuts defining leading and trailing edges of the sheet and being coincident the perforations, the lines of termination being in spaced relationship to the indicia;
a means for determining the position of one of the means for imparting lines of termination or the means or applying indicia;
a means for comparing the position of the indicia on the sheet to the position of one of the means for imparting lines of termination or the means for applying the indicia to the sheet to thereby generate an error signal; and
means for adjusting the spaced relationship between the indicia and the lines of termination by adjusting either said first rate or said second rate while maintaining said coincidence between the chop-off cuts and the perforations, said adjustment being based upon the error signal.
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Abstract
An apparatus and process for making sheets having indicia spaced in a machine direction. Between or among the indicia are perforations or chop-off cuts. The spacing, in the machine direction, between the indicia and perforations or chop-off cuts is maintained over long sheet lengths. The product produced using this apparatus and process is typically paper, and particularly can be used for paper towels or placemats.
101 Citations
19 Claims
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1. An apparatus for registering indicia with lines of termination in a transported sheet, the apparatus comprising:
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a means for transporting a sheet in a first direction; a means for applying spaced indicia to the sheet at predetermined repeating intervals and at a first rate; a means for sensing the position of the indicia on the sheet; means for imparting lines of termination to the sheet at a second rate, said means for imparting lines of termination comprising at lest one rotatable blade and a chop-off roll, said lines of termination comprising a first plurality of chop-off cuts and a second plurality of perforations intermediate said chop-off cuts, said chop-off cuts defining leading and trailing edges of the sheet and being coincident the perforations, the lines of termination being in spaced relationship to the indicia; a means for determining the position of one of the means for imparting lines of termination or the means or applying indicia; a means for comparing the position of the indicia on the sheet to the position of one of the means for imparting lines of termination or the means for applying the indicia to the sheet to thereby generate an error signal; and means for adjusting the spaced relationship between the indicia and the lines of termination by adjusting either said first rate or said second rate while maintaining said coincidence between the chop-off cuts and the perforations, said adjustment being based upon the error signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19)
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16. An apparatus for registering indicia with lines of termination in a sheet, said sheet being transported in a first direction, said apparatus comprising:
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a transport mechanism for transporting sad sheet through said apparatus; means for imparting lines of termination to said sheet, said means for imparting lines of termination comprising at least one rotatable blade and a chop-off roll, said lines of termination being generally orthogonal to said first direction of transport of said sheet, said lines of termination comprising a first plurality of chop-off cuts and a second plurality perforations therebetween, said first plurality of chop-off cuts being coincident at least some of said second plurality of perforations, whereby said sheet has leading and trailing edges defined by said chop-off cuts; a comport for applying indicia to said sheet, said indicia being sized to fit within said leading and trailing edges and disposed in spaced relationship thereto; a means for generating an error signal, the error signal designating the difference between the spacing of the indicia relative to the lines of termination as actually occurs on the sheet and a desired spacing of the indicia relative to the lines of termination; and each of said component and said means for imparting lines of termination being adjustable relative to said sheet as the sheet is transported in said first direction, said adjustment being made in response to said error signal, whereby the spacing of said indicia in said first direction relative to said leading and trailing edges can be adjusted while said sheet is being transported, said chop-off cuts and said perforations maintaining coincidence after said adjustment is made.
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Specification