One-side web treatment method and apparatus with self-forming treatment vessel
AssigneeMinnesota Mining and Manufacturing Company
InventorAlan J. Herbert
Life of this patent
Estimating the term…
Abstract
An apparatus and method for treating one side of a moving web includes a pair of laterally spaced vertical end members. The web to be treated passes in a downwardly extending loop around the lower arcuate edges of the end members and is sealed thereto by tension in the web. The web and end members form a trough containing a flowable treatment material, and the web moves past the flowable material to be contacted and treated thereby. Guide means direct the web downwardly to the inlet side of the trough and upwardly from the exit side of the web-formed trough.
Claims40
An apparatus for treating one side of a moving web with a flowable material comprising:
- a pair of laterally spaced vertical end members having lower arcuate edges for contact with and sealing suport of a said moving web;
- and
- a pair of parallel guide rolls having horizontal axes for supportng and guiding a said moving web, said guide coils comprising:
- a first guide roll for guiding a said moving web in a downwardly extending partial loop in sealing engagement around said arcuate edges of said end members to form a flowable material seal between said web and said arcuate edges defining a retaining trough for said flowable material therebetween and a second guide roll for guiding a said moving web upwardly from said end members under tension for maintaining said material seal with said edges and directing said web to a web accepting means,
- said trough forming a treatment zone to treat a portion of said web between said end members.
An apparatus for treating one side of a moving web with a flowable material, comprising:
- a pair of laterally spaced vertically disposed similar end members having axialy aligned lower arcuate edges for contact with and sealing engagement with transversely spaced edge portions of said moving web;
- a first guide means above said end members for supporting and guiding said web downward and around the lower arcuate edges of said end members;
- a second guide means above said end members for supporting and guiding said web moving upwardly from said end members to a web accepting means;
- and
- a running length of said web supported and guided by said first and second guide means in a downwardly directed partial loop engageable with and placed in tension around said lower arcuate edges of said end members to form a flowable-material retaining trough therebetween, said trough comprising a treatment zone.
A method for treating one side of a moving web with a flowable material, comprising the steps of:
- (a) passing a running length of said web in a downwardly extending partial loop in sealing engagement with the lower arcuate edges of vertically positioned transversely spaced end members to form a flowable-material retaining trough therebetween;
- (b) introducing a flowable treating material into said formed trough;
- and
- (c) drawing said web around said arcuate edges of said end members to expose only the upper surface of said web to said flowable treating material in said formed trough.
A method for one-side imbibition dyeing of a web of film, comprising the steps of:
- (a) passing a running length of said web of film in a downwardly extending partial loop in sealing engagement with the lower arcuate edges of rotating end members to form a liquid retaining trough therebetween;
- (b) introducing an imbibable dye solution into said formed trough;
- (c) drawing said web of film past said end members to expose only the upper surface of said film to said dye solution in said trough, whereby said dye solution is imbibed by said film;
- and
- (d) removing dye solution adhering to said upper surface of said film drawn upwardly from said trough.
Dependencies are inferred from the claim text.