A system and method for curing or drying tobacco leaves are described herein. The method includes flowing a first combustion gas generated by a first heat source through a first flue pipe provided inside a first barn to heat air inside the first barn to cure a first batch of tobacco leaves disposed inside the first barn; transferring at least a portion of the first combustion gas generated by the first heat source to a second flue pipe provided inside a second barn adjacent the first barn to heat the second barn and start curing a second batch of tobacco leaves disposed inside the second barn; and flowing second combustion gas generated by a second heat source through the second flue pipe to continue curing the second batch of tobacco leaves after the second barn is heated.

A system for a tobacco curing barn is capable of collecting tobacco-derived moisture from tobacco while that tobacco is cured. The system incorporates a tobacco curing barn or other type of curing enclosure, such as bulk curing barn used for the flue-curing of tobacco. The curing barn is equipped with at least one reclamation element configured to condense and collect moisture released from tobacco cured within the barn. The reclamation element is disposed in proximity with the enclosure in a manner and location providing passage of moist air released from the tobacco across a surface of the reclamation element. The system also includes at least one storage container disposed in fluid communication with the reclamation element surface and configured to store moisture and moisture-borne material collected by the reclamation element. The resulting tobacco-derived components can be blended with other tobacco materials, such as is common practice during tobacco reordering.

A system for a tobacco curing barn is capable of collecting tobacco-derived moisture from tobacco while that tobacco is cured. The system incorporates a tobacco curing barn or other type of curing enclosure, such as bulk curing barn used for the flue-curing of tobacco. The curing barn is equipped with at least one reclamation element configured to condense and collect moisture released from tobacco cured within the barn. The reclamation element is disposed in proximity with the enclosure in a manner and location providing passage of moist air released from the tobacco across a surface of the reclamation element. The system also includes at least one storage container disposed in fluid communication with the reclamation element surface and configured to store moisture and moisture-borne material collected by the reclamation element. The resulting tobacco-derived components can be blended with other tobacco materials, such as is common practice during tobacco reordering.

This utility model relates to a shed for the air drying and curing of tobacco and the growth and production of seedlings, comprising: (i) a plurality of columns (2) which can be positioned at spaced intervals; (ii) a structure (4) mounted on the said columns; (iii) a removable flexible roof (5) stretched over the said structure (4); (iv) removable flexible side panels (3) extending between the said columns; (v) fixing elements (8) to attach the said side panels (3) and the flexible roof (5).

This utility model relates to a shed for the air drying and curing of tobacco and the growth and production of seedlings, comprising: (i) a plurality of columns (2) which can be positioned at spaced intervals; (ii) a structure (4) mounted on the said columns; (iii) a removable flexible roof (5) stretched over the said structure (4); (iv) removable flexible side panels (3) extending between the said columns; (v) fixing elements (8) to attach the said side panels (3) and the flexible roof (5).

Provided is a method of manufacturing a tobacco raw material in which the green color of the tobacco raw material is maintained and a browning-involved enzyme included in tobacco leaves is deactivated. Specifically, a method of manufacturing a tobacco raw material is provided that includes a step for heating a tobacco leaf material, which has an a* value of 1.0 or less, the a* value being expressed by the L*a*b* method, and which has a moisture content of 8 wt % or less, at a temperature of 75 C. or higher and under a humidity-controlled environment so that the a* value is 1.0 or less and the content of the browning-involved enzyme is 0.1 U/g or less.

Provided is a method of manufacturing a tobacco raw material in which the green color of the tobacco raw material is maintained and a browning-involved enzyme included in tobacco leaves is deactivated. Specifically, a method of manufacturing a tobacco raw material is provided that includes a step for heating a tobacco leaf material, which has an a* value of 1.0 or less, the a* value being expressed by the L*a*b* method, and which has a moisture content of 8 wt % or less, at a temperature of 75 C. or higher and under a humidity-controlled environment so that the a* value is 1.0 or less and the content of the browning-involved enzyme is 0.1 U/g or less.

Methods of curing tobacco that reduce the levels of TSNAs and/or improve leaf quality are described herein.

Methods of curing tobacco that reduce the levels of TSNAs and/or improve leaf quality are described herein.

The present invention relates to systems and apparatus for dark-fire curing of tobacco. Specially, the present invention provides a central control system for controlling and adjusting conditions within a structure utilized for curing dark-fired tobacco, for example by remotely turning the ventilation fan on or off. Additionally, the invention provides for an external smoking structure incorporated into the control system. This allows for simultaneous control of external smoking, that is smoking that is physically separated from curing, and the transportation of smoke into the into the dark-fire curing structure, in addition to the control of the curing structure itself.