Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1977-08-12
1979-10-30
Christian, Leonard D.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
G03B 104
Patent
active
041725697
ABSTRACT:
Disclosed is a peripheral belt drive tape transport system wherein an endless loop drive belt, which is relatively stiff compared to the tape, peripherally drives tape wound supply and take-up hubs to transfer tape from one to the other and maintain a tension in the tape. The drive belt is supported by non-compliant guide means including a plurality of belt guide members, and has first and second portions extending in curved paths between the peripheries of said guide members while intermediately engaging the peripheries of the tape wound on the supply and take-up hubs respectively. The guide members have corresponding portions at first and second levels, the corresponding diameters of which afford different mechanical advantages. The drive belt engages the guide members at the first level. An endless tensioning belt engages the guide members at the second level for establishing a differential in tension between the first and second portions of the drive belt so as to produce a tension in the tape. Significantly, means are included for substantially reducing the net tension variation in the respective drive portions resulting from change in their curved paths due to tape transfer between the hubs. The latter includes means mounting the hubs and guide members on spaced fixed axis locations for producing approximately equal and opposite path length change effects for the first and second portions of the drive belt as the tape transfers between the hub.
REFERENCES:
patent: 2743878 (1956-05-01), Masterson
patent: 3125311 (1964-03-01), Willis
patent: 3514049 (1970-05-01), Decker et al.
patent: 3692255 (1972-09-01), Von Behren
patent: 3907230 (1975-09-01), Merle et al.
patent: 3942743 (1976-03-01), Jinsenji
patent: 3974982 (1976-08-01), Stone
Christian Leonard D.
Fowler Allan R.
Newell Research Corporation
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