U vl kenn  struktury, sest vaj c  alespo  ze t°  oblast  (24, 26, 28, 30, 32, 34, 36), rozm st n²ch ve form  pravideln ho opakuj c ho se vzoru a li  c ch se navz jem alespo  v jedn  ze sv²ch intenzivn ch vlastnost , vybran  ze skupiny, zahrnuj c  plo nou hmotnost, hustotu a pr m r pr m t  velikosti p r , se hodnota plo n  hmotnosti nebo hustoty jedn  oblasti (24, 26, 28, 30, 32, 34, 36) li   alespo  o 25 % od plo n  hmotnosti nebo hustoty druh  oblasti (24, 26, 28, 30, 32, 34, 36). P°i v²rob  vl kenn  struktury se nejprve p°iprav  vl kenn  suspenze a vl kna zadr uj c  tvarovac  prvek, s prvou a druhou stranou, p°i em  prv  strana m  dv  polohou odli n  oblasti, kter  se nach zej  v rozd ln  kolm  vzd lenosti od druh  strany, pak se pomoc  prost°edku pro nan  en  vl kenn  suspenze tato nanese na tvarovac  prvek, na e  se na vybran  oblasti vl kenn  suspenze p sob  prost°edkem k aplikaci diferenci ln ho tlaku. D le se vl kenn  suspenze nejprve su   a pak nan    na tvarovac  prvek se dv ma oblastmi, li  c mi se intenzivn mi vlastnostmi, ur en²ch polohovou odli nost  oblast  tvarovac ho prvku, na e  se na vl kennou suspenzi selektivn  aplikuje diferenci ln  tlak za vzniku t°  oblast  s intenzivn mi vlastnostmi, p°i em  n sledn  se vl kenn  suspenze su   za vzniku celul zov  vl kenn  struktury. Za° zen  sest v  z tvarovac ho prvku, propustn ho pro kapaliny a zadr uj c ho vl kna, se dv ma oblastmi (53a, 53b), odli en²mi polohou, z prost°edku (44) na nan  en  vl kenn  suspenze na tvarovac  prvek, z prost°edku pro aplikaci diferenci ln ho tlaku na vybran  oblasti (24, 26, 28, 30, 32, 34, 36) vl kenn  suspenze, kter  se prostorov  neshoduj  s tvarovac m prvkem, z koopera n
Output: In the invented single lamina cellulosic fibrous structure comprising at least three regions (24, 26, 28, 30, 32, 34, 36), disposed in a nonrandom, repeating pattern and distinguishing from one another at least one of their intensive properties being selected from the group comprising basis weight, density and projected average pore size, the basis weight or density value of one of regions (24, 26, 28, 30, 32, 34, 36) differs by at least 25 percent from the basis weight or density value of the second region (24, 26, 28, 30. 32, 34, 36). A process for producing the invented single lamina cellulosic fibrous structure comprises the steps of providing a fibrous slurry, providing a liquid pervious fiber retentive forming element having a first and a second side, wherein the first side has two positionally different regions extending at a different perpendicular distance from the other side, providing a means to deposit the fibrous slurry on the forming element, providing a means to apply a differential pressure to selected portions the fibrous slurry in concert with a differential pressure cooperating member. Subsequently the fibrous slurry is first dried and then applied to a forming element having two regions differing in intensive properties defined by position difference of the forming element regions, whereupon the fibrous slurry is selectively subjected to a differential pressure to obtain three regions with intensive properties, wherein subsequently the fibrous slurry is dried to form the single lamina cellulosic fibrous structure. Apparatus for making the above described process comprises a liquid pervious fiber retentive forming element having two topographically distinct regions (53a and 53b) distinguishing by position from each other, means (44) for depositing the fibrous slurry onto a liquid pervious forming element, means to apply a differential pressure to selected portions (24, 26, 28, 30, 32, 34, 36) of the fibrous slurry, which portions distinguish from each other by their position with respect to the forming element, a differential pressure cooperating member, and means (50a, 50b) for drying the fibrous slurry, whereby the forming means is represented by a forming belt (42), said differential pressure cooperating member has regions that are pervious to gases and that are not in compliance with the position of the forming element region (53b) and said  differential pressure cooperating member is represented by an endless secondary belt (46).