什么是裹背(bei)條(tiao)，裹背(bei)條(tiao)是通(tong)過皮殼(ke)機等機械(xie)用于精(jing)裝(zhuang)書(shu)(shu)本的書(shu)(shu)脊(ji)部(bu)分，使(shi)書(shu)(shu)貼連(lian)接得更加牢固。書(shu)(shu)脊(ji)制作(zuo)弧長的計算(suan)，本器規(gui)格依書(shu)(shu)芯幅面大小進(jin)行調定(ding)，以能將書(shu)(shu)芯平穩地送進(jin)夾(jia)書(shu)(shu)裝(zhuang)置內為標(biao)準。入本后的書(shu)(shu)冊(ce)不斜歪，四角垂直地頂齊(qi)在夾(jia)書(shu)(shu)裝(zhuang)置的靠(kao)板、側(ce)規(gui)內。裁切尺寸(cun)正確一致，其(qi)質(zhi)量要(yao)求與(yu)規(gui)格誤差與(yu)一般切書(shu)(shu)相同。

夾(jia)書簽絲(si)帶裝置安放在(zai)切(qie)(qie)書機(ji)(ji)與扒圓起脊(ji)機(ji)(ji)之間。即將切(qie)(qie)完的(de)書芯(xin)，用(yong)分本(ben)器(qi)從(cong)中間分開(kai)，再由輸放絲(si)帶器(qi)將絲(si)帶夾(jia)入中心紙書芯(xin)的(de)中間靠(kao)訂縫一邊(bian)。絲(si)帶夾(jia)在(zai)書芯(xin)內兩端各留出粘邊(bian)和(he)使用(yong)的(de)余地，再經切(qie)(qie)刀（剪刀式）將其剪斷。

剪斷后(hou)(hou)的(de)絲(si)帶，裹(guo)(guo)背條芯(xin)部分被下面膠輥著(zhu)膠、壓實完成(cheng)夾(jia)書(shu)(shu)(shu)簽絲(si)帶過程。書(shu)(shu)(shu)簽絲(si)帶的(de)長度與(yu)一般手工(gong)(gong)(gong)加工(gong)(gong)(gong)長度基本相同，可依(yi)書(shu)(shu)(shu)冊幅面長度調定。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)操作及要求。書(shu)(shu)(shu)芯(xin)經裁切(qie)、夾(jia)粘絲(si)帶（或不夾(jia)粘絲(si)帶）后(hou)(hou)，繼續傳送（或翻(fan)轉(zhuan)變位）并做90°翻(fan)轉(zhuan)，使(shi)平放(fang)書(shu)(shu)(shu)芯(xin)變為(wei)后(hou)(hou)背朝上（或朝下）而進(jin)入(ru)扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)機(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)機(ji)的(de)加工(gong)(gong)(gong)，其操作分為(wei)兩步，但機(ji)器(qi)的(de)結構是(shi)(shi)連在一起(qi)(qi)的(de)，均是(shi)(shi)先(xian)扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)后(hou)(hou)起(qi)(qi)脊(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)(qi)脊(ji)機(ji)在扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)時(shi)，由(you)一組（或一對）圓(yuan)(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)芯(xin)壓緊后(hou)(hou)作相對旋轉(zhuan)動作），使(shi)書(shu)(shu)(shu)背扒(ba)(ba)(ba)成(cheng)適當規(gui)格(ge)圓(yuan)(yuan)(yuan)(yuan)勢，加工(gong)(gong)(gong)成(cheng)圓(yuan)(yuan)(yuan)(yuan)背書(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)背的(de)形狀分為(wei)圓(yuan)(yuan)(yuan)(yuan)背有脊(ji)、圓(yuan)(yuan)(yuan)(yuan)背無脊(ji)和方背（或稱平背）三種。平裝裹(guo)(guo)背條書(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)脊(ji)不高(gao)出書(shu)(shu)(shu)芯(xin)平面，而精裝書(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)脊(ji)一般要高(gao)出書(shu)(shu)(shu)芯(xin)的(de)平面。書(shu)(shu)(shu)脊(ji)分為(wei)真脊(ji)和假(jia)脊(ji)。

真脊是利(li)用書背(bei)(bei)上下兩邊變(bian)形的(de)(de)弧(hu)度(du)高(gao)出書芯(xin)平(ping)面(mian)；假(jia)脊則是利(li)用紙板(ban)鑲在書背(bei)(bei)后形成的(de)(de)書脊，書脊的(de)(de)脊高(gao)等(deng)于封面(mian)紙板(ban)的(de)(de)厚度(du)。方(fang)背(bei)(bei)書芯(xin)。是指書芯(xin)的(de)(de)書背(bei)(bei)平(ping)直(zhi)方(fang)正。書背(bei)(bei)不突出，與平(ping)裝書刊的(de)(de)書背(bei)(bei)基本相似。

背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)上下(xia)環襯互成直角，由于(yu)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)是用鎖(suo)線訂訂連，每一個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)訂口(kou)折縫里(li)面都(dou)用線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)脊(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其(qi)它部分要厚(hou)(hou)(hou)(hou)一些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)的(de)(de)(de)帖(tie)數越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)其(qi)它部分厚(hou)(hou)(hou)(hou)度(du)的(de)(de)(de)差別也越大。所以方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)形式一般只(zhi)用于(yu)厚(hou)(hou)(hou)(hou)度(du)約為20mm的(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)又(you)稱圓(yuan)(yuan)背(bei)(bei)(bei)(bei)真(zhen)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)高(gao)起(qi)有(you)(you)脊(ji)壟，堅(jian)硬挺實(shi)，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)形式適合于(yu)裝(zhuang)訂較(jiao)厚(hou)(hou)(hou)(hou)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)(you)明顯(xian)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱(yue)方(fang)便。目(mu)前我國的(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)多(duo)采用這種圓(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)的(de)(de)(de)加(jia)(jia)工(gong)形式。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)又(you)稱圓(yuan)(yuan)背(bei)(bei)(bei)(bei)假脊(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)厚(hou)(hou)(hou)(hou)度(du)相同(tong)，堅(jian)實(shi)挺括，但沒有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條(tiao)脊(ji)。這種形式的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)，一般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑(su)料(liao)壓制(zhi)而成的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相配(pei)套。中心紙(zhi)有(you)(you)些機器還沒有(you)(you)沖(chong)圓(yuan)(yuan)裝(zhuang)置，即將方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖(chong)圓(yuan)(yuan)加(jia)(jia)工(gong)，作初(chu)步定型。先(xian)根據(ju)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)厚(hou)(hou)(hou)(hou)度(du)和中心紙(zhi)幅(fu)面大小調定好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及(ji)扒(ba)圓(yuan)(yuan)輥(gun)（或沖(chong)圓(yuan)(yuan)裝(zhuang)置）的(de)(de)(de)規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)(xin)(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并(bing)送到扒(ba)圓(yuan)(yuan)輥(gun)之(zhi)間(jian)，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒(ba)擠(ji)成一定圓(yuan)(yuan)勢。