(57) @ A roughened cleaning sponge, particularly for easily scratched surfaces, such as
stainless steel surfaces, surfaces coated with thin layers of a plastic material,
motor vehicle windshields, and the like, which comprises a core (2) of a sponge-like
materiale covered with an outer roughening fabric (3). Both the core (2) of a sponge-like
materiale and the roughening fabric (3), the latter being a knit tubing, are formed
form a thermoplastic plastics. The crosswise seams are pressure heat sealed to define
a stiff heat sealed band (4) having scraping side and corner portions (4a). A reliable
and durable envelope is thus provided for the sponge-like core (2). Manufacturing
begins with the formation of a basic blank (6) of some length from which individual
sponges (1) are fabricated by heat sealing and severing along the heat sealed end
bands (4) thereof.
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