Abstract:
Coreless tissue rolls can be produced without having to use an adhesive to form a hollow center. Instead, moisture can be used to promote light hydrogen bonding between the layers of the tissue web that line the hollow center. The hydrogen bonding provides sufficient structure to maintain the shape of the hollow center without rendering the tissue web surrounding the passageway unusable. Passageways can also be formed in accordance with the present disclosure that are substantially circular so that the rolls will easily spin on a spindle. In an alternative embodiment, moisture is not used in constructing the wound tissue roll.
Abstract:
A roll of a sheet material is provided with elongated sheets within the roll that are either completely detached from each other, or substantially completely detached from each other, such that the user can dispense the elongated sheets with one hand. In the case of toilet paper, the elongated sheets have a pre-determined length deemed to be suitable for most users and serve to assist young children in dispensing a proper amount of tissue from the roll.
Abstract:
Coreless rolls of tissue, such as rolls of bath tissue or paper towels, are produced by winding tissue logs on a mandrel having retractable pins. During winding, the pins extend and penetrate the first several windings of the log as it is initially wound, which prevents slippage. After the winding is complete, the pins retract to allow the tissue log to slide off of the mandrel for subsequent slitting into individual product rolls and packaging. The penetration of the pins into the first several windings of the log tends to mechanically entangle and structurally unify those windings to create a "soft core". At the same time, the properties of the tissue sheets within the soft core are the same as the other sheets within the roll and are therefore usable by the consumer.
Abstract:
Curvilinear or other complex perforation patterns for paper products, such as paper towels and bath tissue, can be produced using a differential speed perforation nip formed between a rotating pattern roll and a moving anvil surface. The relative speed between the perforation elements on the surface of the pattern roll and the anvil surface shears the web at the perforation points.
Abstract:
A product (21) including two or more plies with each ply including one absorbent layer and a second opposing fluid impervious layer. The two plies are arranged such that the fluid- impervious layers (22) face each other and are positioned at the inside of the two-ply product. The two plies are bonded on two or three sides to form a sleeve (27) or a pocket (27), such that a hand can be inserted between the two plies and positioned in contact with one or both fluid impervious layers. In this manner, the product is absorbent on both sides, and can be utilized on both sides while preventing hand contact with the material absorbed or picked up by the product.
Abstract:
Generally, the present disclosure is directed to, in one embodiment, a process for controlling a converting line web. More specifically, a sheet material is provided on the converting line (14). A loss of control is detected in the sheet material web and the sheet material web is broken at a location (28) upstream from the converting line web rewinder. The broken sheet material web is redirected.
Abstract:
Coreless rolls of tissue, such as rolls of bath tissue or paper towels, are produced by winding tissue logs on a mandrel having retractable pins. During winding, the pins extend and penetrate the first several windings of the log as it is initially wound, which prevents slippage. After the winding is complete, the pins retract to allow the tissue log to slide off of the mandrel for subsequent slitting into individual product rolls and packaging. The penetration of the pins into the first several windings of the log tends to mechanically entangle and structurally unify those windings to create a "soft core". At the same time, the properties of the tissue sheets within the soft core are the same as the other sheets within the roll and are therefore usable by the consumer.
Abstract:
An apparatus (60) for breaking a moving web comprissing: a conveying surface (3Od) over wich a moving web (3S) is conveyed; a first rotating arm (306) and a second rotating arm (308) positioned adjacent to the conveying surface, the first rotating arm (306) being spaced upstream from the second rotating arm with respect to a moving web, the first rotating arm defining a first contact surface (310) that contacts the conveying surface (300) when the first rotating arm is rotated, the second rotating arm defining a second contact surface (312) that also contacts the conveying surface when the second rotating arm is rotated; and wherein, in order to break a moving web on the conveying surface,both rotating arms are rotated causing each of the respective contact surfaces to contact the moving web on the conveying surface at or near the same time, the second rotating arm being configured to rotate at a speed faster than the first rotating arm during contact with the moving web causing the moving web to break in between the first and second contact surfaces.
Abstract:
A method and apparatus (20) for intermittently cutting a moving target web (26) includes rotating a knife roll (32) having at least one knife member (44) to provide an operative knife-member speed, and rotating an anvil roll (34) having at least one anvil member (46) to provide an operative anvil-member speed. The knife roll and anvil roll have been positioned to provide an operative nip region (30) therebetween, and a substantially continuous target web (26) has been moved at a selected web speed through the nip region. A rotational positioning of the knife member has been coordinated with a rotational positioning of its cooperating anvil member to provide an operative, cutting engagement between the knife member and its cooperating anvil member, thereby cutting the moving web at cut locations which are intermittently spaced along a machine-direction (22) of the target web.
Abstract:
By designing a belt-driven unwind to have two distinct belt tension areas, the belt pressure against the unwinding roll (40) can be decreased. The belt-driven unwind can have a higher belt tension section for proper belt tracking and to prevent slippage at the drive roller (20), and the belt driven unwind can have a lower belt tension section for the portion of the belt in contact with the unwinding roll. In this manner, the belt-driven unwind can be used with soft, bulky tissue rolls (40) without damaging the rolls like a conventional belt-driven unwind.