A weakening composition printed onto newsprint in a predetermined pattern causes the newsprint to weaken within a short period of time along the lines of the pattern so that the newsprint tears preferentially along the outline of the pattern.
申请公布号
US4162339(A)
申请公布日期
1979.07.24
申请号
US19780875813
申请日期
1978.02.07
申请人
HUNKINS, JAMES;RINSLER, SAMUEL J;WECK, FRIEDRICH J
发明人
HUNKINS, JAMES;RINSLER, SAMUEL J;WECK, FRIEDRICH J