초록 ▼

Indicia are formed on the outside surface of drip irrigation tape by deforming the strip of flexible material when it is in a semi-molten state and cooling the strip while it is deformed. The indicia may include alphanumeric characters, logos or symbols that convey information. Indicia forming featu

Indicia are formed on the outside surface of drip irrigation tape by deforming the strip of flexible material when it is in a semi-molten state and cooling the strip while it is deformed. The indicia may include alphanumeric characters, logos or symbols that convey information. Indicia forming features in the surface of a shaping drum mold the strip of semi-molten material as the semi-molten material cures to form a flexible strip. The flexible strip is folded and sealed to form the drip irrigation tape.

대표청구항 ▼

1. A drip irrigation tape comprising:a main conduit of flexible material formed into a tube; a secondary conduit having at least one inlet communicating with the main conduit and at least one outlet at a fixed distance from said inlet; the main conduit having an outer surface having a plurality of d

1. A drip irrigation tape comprising:a main conduit of flexible material formed into a tube; a secondary conduit having at least one inlet communicating with the main conduit and at least one outlet at a fixed distance from said inlet; the main conduit having an outer surface having a plurality of deformations arranged to form spaced, separate indicia, each deformation comprising an indentation of predetermined shape formed by deforming the material of the main conduit; and the deformations comprising raised portions of flexible material extending beyond the outer surface of the main conduit.